A screenshot of a Yahoo Mail inbox
Type of site
|Available in||Multilingual (27)|
|Users||281 million (December 2012)|
|Launched||October 8, 1997|
Yahoo Mail is a free email service (except for Yahoo! Mail Business Email Plans) offered by the American company Yahoo! It was launched in 1997, and, according to comScore, Yahoo Mail was the third-largest web-based email service with 281 million users as of December 2011.
As many as three web interfaces were available at any given date. The traditional "Yahoo Mail Classic" preserved the availability of their original 1997 interface until July 2013 in North America. A 2005 version included a new Ajax interface, drag-and-drop, improved search, keyboard shortcuts, address auto-completion and tabs. However other features were removed, such as column widths and one click delete-move-to-next. In October 2010, Yahoo released a beta version of Yahoo Mail that included improvements to performance, search and Facebook integration. In May 2011 it became the default interface. Their current Webmail interface was introduced during 2012. Yahoo Mail had unlimited storage from March 27, 2007 until October 8th, 2013. The new design introduced to users from October 2013 was met with heavy criticism of its layout and user ability. Yahoo Mail suffered a major outage where some users could not access their email messages beginning December 10, 2013 until December 12th, 2013, when the outage was fully resolved.
- 1 Features
- 2 History
- 3 Spam policy
- 4 Controversy
- 5 NNFMP
- 6 Email domains
- 7 See also
- 8 References
- 9 External links
The service comes in two configurations, free and business. Features include:
- Email storage capacity: 1 TB 
- Email attachment limit: 25 MB (up to 100 MB via the built-in 'Attach Large Files' app)
- Account expiry on inactivity: 6 months plus 2 months for each year the account held active. The account can be retrieved but all stored data, such as emails, are lost.
- Supported protocols: POP3 in Asia or via YPOPs!, IMAP via IMAP proxy or via Zimbra, SMTP, Mail Forwarding in some countries (but not in the US). US Users cannot order the POP3 / forwarding service – attempts give a currently not for sale error.
- 100 filters to automatically sort incoming messages (200 filters for the Plus version)
- Spam and virus protection. (See: DomainKeys)
- Advertising is displayed on the screen while working with the email account. Text ads are added to the footer of outgoing messages, as of February 2011.
Users from countries where there is a web browser access restriction can get around it by using software that simulates a POP3 server to which the email application connects, such as YPOPs! and FreePOPs.
Another way of getting POP3 access without signing up for the paid mail plans is via Yahoo! Delivers, which sends the user promotional email messages. According to the Yahoo! Mail help pages, "Yahoo! offers POP access to Yahoo! Mail as a free feature exclusively for Yahoo! Delivers members". However, this applies only to users of Canadian Yahoo Mail with "@yahoo.ca" extension of their mail.
(See the above '2012 release' section for a further way to set up POP access for North American accounts.)
As of October 2013, Yahoo provides paid subscribers POP3 access and forwarding.
Free IMAP and SMTPs access
Yahoo operates IMAP and secure IMAP servers (imap.mail.yahoo.com in particular), which are globally accessible. According to the company, IMAP access is only allowed for smartphones on mobile networks.
For regular users, an IMAP proxy like Yahoo IMAP Connector may be needed to connect to the Yahoo! IMAP servers. Alternatively, modifications are available for some email clients, such as Mozilla Thunderbird and Mutt, although most can use Yahoo's IMAP server as an ordinary IMAP client without modifications. The proxy method is required to access Yahoo email through proprietary email clients like Microsoft Outlook.
It is also possible to send mail through mail clients as Yahoo also operates an SMTP server (smtp.mail.yahoo.com). It is necessary to enable SSL through port 465. For IMAP and SMTPS access, the username is the user's Yahoo Mail address, and the password is the same as for web access.
Mac OS X users can directly set up an IMAP account in Apple Mail 4.4. After entering a full name, email address, and password, hold down the Option key. The Create button will change to Continue, allowing one to manually configure the account settings.
Apple Mail 5.0 included with Mac OS X Lion supports easy and direct IMAP account setup.
Yahoo! Business Email is a combination of all of their email services with 10 distinct accounts each with the same features of the plus version and personalized domain name and email address. Accounts can be managed by an administrator. There is a $25 set-up fee and $9.99 monthly fee.
- Unlimited mail storage
- 10 email quota.
- Additionally, a user can pay $35 per year to have up to five custom email addresses and a domain name.
- Classic Yahoo Mail underlines addresses and phone numbers in emails and allows the user to add them to the address book.
Yahoo made a deal with the online communications company Four11 for co-branded white pages. Marvin Gavin, who worked at Four11 as director of international business development said, "We always had a bias about being acquired by Yahoo. They were more entrepreneurial than Microsoft. We had a great cultural fit – it made a lot of sense." The real point in acquiring Four11 was the company's Rocketmail webmail service, launched in 1997. In the end, Yahoo! acquired Four11 for $96 million. Yahoo announced the acquisition on October 8, 1997, close to the time that Yahoo! Mail was launched. Yahoo! chose acquisition rather than internal platform development because, as Healy said, "Hotmail was growing at thousands and thousands users per week. We did an analysis. For us to build, it would have taken four to six months, and by then, so many users would have taken an email account. The speed of the market was critical."
The transition to Yahoo Mail was not easy for many Rocketmail users. Soon after, on March 21, 2002, Yahoo! eliminated free software client access and introduced the $29.99 per year Mail Forwarding Service. Mary Osako, a Yahoo Spokeswoman, told CNET, "For-pay services on Yahoo!, originally launched in February 1999, have experienced great acceptance from our base of active registered users, and we expect this adoption to continue to grow."
During the summer of 2002, the Yahoo network was gradually redesigned. On July 2, the company website was redesigned and it was announced that Yahoo Mail and other services would also change. Along with this new design, new features were to be implemented, including drop-down menus in DHTML and different category tabs, and a new user-customizable color scheme.
In November of the same year, Yahoo launched another paid service: Yahoo Mail Plus. Yahoo Mail Plus offered a number of additional features, including:
- 25 megabytes of email storage
- 10 megabyte message size limit
- Up to 10 attachments per email
- POP Access and Forwarding
- Archiving of email messages for offline access
- Ability to send messages from Yahoo! Mail using other email domains
- 200 blocked addresses and 50 filters to help screen unsolicited emails
- No promotional taglines in messages
- No account expiration
The launch of Yahoo Mail Plus is part of Yahoo's strategic initiative to offer premium services that deliver innovative, reliable and relevant services to consumers....In just five years, Yahoo Mail has grown from one million to tens of millions of users, illustrating how consumers have made e-mail an essential part of their daily lives. Through Yahoo! Mail Plus, Yahoo! continues to demonstrate leadership and innovation by offering consumers the industry's most complete and powerful e-mail solution.—Geoff Ralston, senior vice president, Yahoo! Network Services
On April 1, 2004, Google announced its Gmail service with 1 gigabyte of storage. Gmail's invitation-only accounts kept the other webmail services at the forefront. Most major webmail providers, including Yahoo Mail, increased their mailbox storage in response. Yahoo! was the first to announce 100 MB of storage for basic accounts and 2 GB of storage for premium users. Determined not to lose customers, Yahoo! Mail then countered Hotmail and Google by increasing its free storage quota 1 GB, before eventually allowed unlimited storage.
On July 9, 2004, Yahoo acquired Oddpost, a webmail service that simulated a desktop email client. Oddpost had features such as drag-and-drop support, right-click menus, RSS feeds, a preview pane and increased speed, using email caching to shorten response time. Many were incorporated into an updated Yahoo Mail service.
Yahoo Mail Classic was their first (1997) interface, and was eventually discontinued only in July 2013.
In March 2009, Yahoo Mail Classic integrated Yahoo! Messenger into its interface, and later removed it during March 2013.
In mid-2011, Yahoo began a new initiative to implement an unsolicited redirect of Classic Mail users to the new Yahoo! Mail. However, users could at that time still revert to Classic Mail by explicitly launching Classic Mail.
On approximately July 8, 2013 (North America), after nearly 3 months of formal notice, Yahoo shut the door to Classic, requiring all users to upgrade to their latest (2012) version.
Upgrading also required users to accept its new terms of service (ToS), allowing the company to scan emails and serve relevant advertising based on message content.
These changes led some users to consider other WebMail choices.
One remaining way to currently login to Yahoo for limited access from a PC is to use their Mobile Device login (normally used by portable phones and tablets.)
The Yahoo Plus (Paid) service appears to have undergone the same interface change as the free Yahoo WebMail.
In September 2005, Yahoo! began beta testing a significantly enhanced version that was designed to mimic a desktop mail client. It featured drag-and-drop, search, keyboard shortcuts, address auto-completion and tabs. It integrated Yahoo! Messenger, allowing, users to chat while reading email. On August 26, 2007, the new Yahoo! Mail exited beta and became the default interface. In early 2008, Yahoo! began offering unlimited mail storage.
Public beta began in late 2006. In November, Yahoo announced its Yahoo! Messenger integration. This service was deployed in March, 2007. Public and critical reaction was positive, despite some performance issues. On August 26, 2007, the new Yahoo! Mail left beta. The final version was released on October 9, 2007.
Some of the new or improved features included in the new Yahoo! Mail were:
- Yahoo Calendar integration
- Yahoo Messenger integration
- Windows Live Messenger integration
- SMS Messaging in certain countries
- Keyboard shortcuts
- Unlimited storage
- Improved search facilities
- Applications (Piknic, Flickr, Wordpress and more)
In addition, an Easter egg was added called a Subject-O-Matique. This hidden feature displays a random message in the subject line when the subject button is clicked. The messages range from cultural references ("I AM the walrus") to sarcastic ("If you don't tell lies, at least you don't have to remember what you have said.") to unusual and outlandish ("the art of driving a giant, nuclear powered duck"). On December 15, 2008, Yahoo Mail introduced features to make it more social.
Ymail and Rocketmail
Yahoo Mail Vice President John Kremer on June 19, 2008 announced the tripling of the size of its free online email service with the launching of two domains as options for its 266 million users of "@yahoo.com" addresses - the new, simpler email addresses ending in ymail.com and rocketmail.com. Rocketmail has a "hip retro feel" since it is a resurrected email address of a 1997 Yahoo service. Email under the ymail and rocketmail domains offered the same features as the Yahoo domain. Effective from April 2013, Yahoo no longer allows registration of new Yahoo ID’s using the Ymail and Rocketmail domains. Existing Ymail and Rocketmail accounts are not affected by this change.
Codenamed "Minty", the 2011 release was announced on September 16, 2010. It included a new interface, enhanced performance, improved Facebook and Twitter integration, the ability to watch YouTube videos straight from email and improved search. Public beta began on October 26, 2010. In May 2011 the new Yahoo! Mail became the default interface.
As the new interface became mandatory for users, some users of Yahoo Mail reported slow typing speeds, contradicting Yahoo's claims of "2x" faster performance. Yahoo offered no resolution to the problem as of September 12, 2011. Users also missed the ability to paste textual email addresses into the sender box. The new version disables the use of the "secondary" addresses provided in the previous version. The new interface overrides the browser's right mouse button (e.g., making functions such as opening mails in new tab windows unavailable).
A redesigned interface, complete with new versions for Windows 8, Android and iPhone clients, was introduced in December 2012. Yahoo announced that the update would make it faster and easier to navigate the service and would create one style for all devices. According to a CNN report, the new service was compatible with platforms such as Android, iOS and Windows 8.
During May 2013, it was discovered that Yahoo's free WebMail service (both 2012 and Classic editions) could, at least in North America, be configured with a POP client application instead of relying only upon their web interface.
In order to set up this POP access to Yahoo Mail, one must begin by enabling it through the 'account options' screens while logged into their WebMail interface, and follow by configuring one's client software, such as Thunderbird, Eudora, or Outlook.
It will also be necessary to first accept Yahoo's new WebMail interface and ToS in order to reach the account options screens.
Like Yahoo's redesign of its other properties Flickr, Yahoo! Groups, and Yahoo! Answers in the same year, the redesign on October 8, 2013 of Yahoo New Mail has prompted unprecedented worldwide criticism from users and a deluge of critical media coverage, in particular removal of features such as simultaneously opening multiple emails in tabs, sorting by sender name, drag and drop of mails to folders etc. The new email interface is geared to give a good user-experience for owners of hand-held devices, but leaves email users, who compose emails on their desktops, struggling to cope with inferior desktop interface design. According to the New York Post Yahoo! mail users are angry about the unannounced and unwanted changes foisted on them by Yahoo!. One hundred thousand voted and almost ten thousand commented on an online post asking Yahoo! to bring back Mail tabs.
-received re-design has been accompanied by a multi-week outage that Yahoo has been reluctant to admit anything about. In regards to the outage, and user dissatisfaction with the site re-design, Jeff Bonforte, the head of Yahoo Mail, said at a weekly employee meeting that Yahoo would have to "kick users hard" in the nuts before they would leave Yahoo Mail 
Yahoo Mail suffered a major outage where approximately one million users could not access their emails beginning December 10, 2013. As of December 12, 2013, the outage was not fully resolved, but Mayer publicly apologized to Yahoo! Mail users on December 13, 2013.
The company then admitted on January 30, 2014 that an undisclosed number of usernames and passwords were disclosed after a security breach that it believes occurred through a third-party website. Jay Rossiter, Senior Vice President of Platforms and Personalization Products, wrote on Yahoo!'s Tumblr page that "We [Yahoo!] regret this has happened and want to assure our users that we take the security of their data very seriously." Yahoo! did not disclose when the breach occurred or how many accounts had been compromised, but as of January 30, had commenced contacting affected users and requesting that passwords be changed.
Yahoo Mail is often used by spammers to provide a "remove me" email address. More often than not, these addresses are used to verify the recipient's address—thus opening the door for more spam.
However, Yahoo does not tolerate this practice. It terminates accounts connected with spam-related activities without warning, and spammers lose access to any other Yahoo services connected with their ID under the Terms of Service. Additionally, Yahoo! stresses that its servers are based in California, and any spam-related activity that uses its servers could potentially violate that state's anti-spam laws.
In February 2006, Yahoo announced its decision (along with AOL) to give some organizations the option to "certify" mail, by paying up to one cent for each outgoing message, allowing the mail in question to bypass inbound spam filters.
In April 2011, Yahoo Mail began rejecting spam reports that involve sending a copy of the spam with full headers to Yahoo's abuse department via the email address abuse (at) yahoo.com, and the response email for those that did was to use a form instead. However, the requirement to use a form is prohibited by several Internet RFCs, and the availability of abuse (at) example.com (in this case abuse (at) yahoo.com) is required by the Invariants clause of RFC 2142 because the domain has a mail server and MX record. Yahoo's claim was that its "standard" was "better" than the Internet standards referred to. Aside from this, there is currently no working form through which users can report spam or misuse of the Yahoo! email service.
When asked about these changes, Yahoo explained that the changed words were common terms used in Web scripting, and were blacklisted to prevent hackers from sending damaging commands via the program's HTML function. Starting before February 7, 2006, Yahoo Mail ended the practice and began to prefix an "_" (underscore) to certain suspicious words and word fragments.
Incoming mail to Yahoo addresses can be subjected to deferred delivery as part of Yahoo's incoming spam controls. This can delay delivery of mail sent to Yahoo addresses without the sender or recipients being aware of it. The deferral is typically of short duration, but may extend to several hours. Yahoo does not specifically document this policy in detail, although some information is available.
Shi Tao arrest
In 2004, Yahoo's Hong Kong office provided technical information to the Chinese authorities about the account of journalist Shi Tao, who was subsequently sentenced to ten years' imprisonment for "leaking state secrets". Yahoo was criticized by Reporters Without Borders for acting as a "police informant" to increase its profits. In August 2007, the United States Congress began an investigation into Yahoo's handling of the case. Yahoo! founder Jerry Yang testified before Congress. On November 6, 2007, the congressional panel criticized Yahoo! for not giving full details to the House Foreign Affairs Committee the previous year, stating it had been "at best inexcusably negligent" and at worst "deceptive"; Representative Tom Lantos described its executives as moral "pygmies". Yang responded that Yahoo! no longer controlled its Chinese operations and was collaborating with human rights groups to formulate ethical code for technology companies.
In a February 2006 hearing, Yahoo executives swore that they had no information about the investigation. Some months later, it was discovered that the document provided to Yahoo China on April 22, 2004 by the Beijing State Security Bureau stated, "Your office is in possession of the following items relating to a case of suspected illegal provision of state secrets to foreign entities."
On February 20, 2006, it was revealed that Yahoo Mail was banning the word "Allah" in email usernames, both separately and as part of a user name such as linda.callahan. Shortly after the news of the ban, it was lifted on February 23, 2006. Along with this action, Yahoo! also made the following statement:
We continuously evaluate abuse patterns in registration usernames to help prevent spam, fraud and other inappropriate behavior. A small number of people registered for IDs using specific terms with the sole purpose of promoting hate, and then used those IDs to post content that was harmful or threatening to others, thus violating Yahoo!'s Terms of Service.
'Allah' was one word being used for these purposes, with instances tied to defamatory language. We took steps to help protect our users by prohibiting use of the term in Yahoo usernames. We recently re-evaluated the term 'Allah' and users can now register for IDs with this word because it is no longer a significant target for abuse. We regularly evaluate this type of activity and will continue to make adjustments to our registration process to help foster a positive customer experience.
Exploit of Yahoo Mail was sold for $700 by an Egyptian hacker that allowed hijackers to hack Yahoo! Mail user accounts and redirect users to a malicious website. The attack used cross-site scripting that let hackers steal cookies. In January 2013, hacker and security researcher Shahin Ramezany pointed out another DOM-based XSS loophole that placed 400 million users at risk.
From 2007, Yahoo provided major New Zealand Telecom's email service, which came under criticism in early 2013 following a spam and phishing attack described as the biggest to have ever hit the country. Telecom and Yahoo! automatically reset "about 60,000" users' passwords. In April, Telecom announced that despite the issue, it would keep Yahoo! on as an email provider.
China Yahoo! Mail closedown
On 18 April 2013, China Yahoo Mail officially announced its shutdown. After that, all mails, contacts and account settings would be deleted and unavailable unless one of the migration options is taken.
Users could migrate to Yahoo Mail in the United States. However, customers whose account was originally registered in Yahoo Mail but migrated to China Yahoo! Mail after the China Yahoo takeover by Alibaba were unable to register a Yahoo! Mail account with the same username.
NNFMP is an internal protocol not recognized by IANA or RFCs. Yahoo uses this protocol to internally route email traffic across their network. The acronym stands for "Newman No-Frills Mail Protocol". It is a simple, high-performance protocol comparable to QMTP. However, Yahoo does not officially recognize its use.
- "Business Email Plans". Yahoo!. Retrieved April 5, 2014.
- McDowell, David. "Yahoo Mail Beta Was Released October 2010". Retrieved July 2, 2011.
- "Yahoo Mail Beta Features". Retrieved 07/05/2011. Check date values in:
- "Yahoo Mail Beta Became Yahoo Mail in May 2011". Retrieved July 2, 2011.
- Peterson, Andrea (2013-12-16). "Marissa Mayer personally apologizes for Yahoo Mail outage". Washingtonpost.com. Retrieved 2014-01-31.
- "Yahoo! Mail reduces its storage from unlimited to 1 TB". Hot Hardware. Retrieved 2013-10-08.
- "September 28, 2011". Overview.mail.yahoo.com. Retrieved January 30, 2012.
- Do you close accounts due to inactivity? Yahoo! Help
- "Can I use other email programs, such as Netscape, Eudora, or Outlook, to send and read my Yahoo! Mail?". Yahoo! Canada Mail Help.
- "US members have POP access only in Yahoo Mail Plus". Help.yahoo.com. December 5, 2011. Retrieved January 30, 2012.
- "Yahoo Standard Mail Account Features". Help.yahoo.com. October 11, 2013. Retrieved October 11, 2012.
- "Imap.mail.yahoo.com is now available", Mozilla bugzilla, Bug 493064, retrieved August 28, 2011
- "Yahoo IMAP Connector". Bravurasoftware.com. Retrieved January 30, 2012.
- "mutt and thunderbird with yahoo imap support". Crasseux.com. January 20, 2003. Retrieved January 30, 2012.
- "Yahoo Completes Four11 Acquisition" (Press release). Yahoo!. October 23, 1997.
- "Yahoo! Expands Community Services with Free E-mail" (Press release). Yahoo!. October 8, 1997.
- Griffin, Gretchen. "Rocketmail Slowly Gets Grounded". Flak Magazine.
- Hu, Jim (March 21, 2002). "Yahoo! tacks fees onto e-mail, storage". CNET News. Archived from the original on July 11, 2012. Retrieved June 1, 2006.
- "Yahoo! unveils home page face-lift". ZDNet. July 2, 2002. Archived from the original on June 18, 2006. Retrieved May 31, 2006.
- "Yahoo! Introduces Yahoo! Mail Plus To Help Consumers Manage Their Growing E-Mail Needs" (Press release). Yahoo!. November 14, 2002.
- "Yahoo Announces "New and Improved" Yahoo! Mail, Introduces Major Increase in Storage Space, Makes 50 Million Additional E-Mail Addresses Available" (Press release). Yahoo. June 15, 2004.
- "Yahoo Begins Public Testing of New Yahoo! Mail" (Press release). Yahoo!. September 14, 2005.
- Mossberg, Walter S. (August 30, 2007). "Years in the Making, Powerful Yahoo Mail Is Worth the Wait". The Wall Street Journal.
- "2010 new mail program". usatoday.com. September 16, 2010.
- Knibbs, Kate. "R.I.P Yahoo Mail Classic Messenger, we hardly knew ye". Digital Trends. Retrieved 30 March 2013.
- "No More Yahoo Mail Classic, New Version Scans E-Mails". W3Reports. Retrieved 3 June 2013.
- "Alternatives to Yahoo's Free WebMail - Pros & Cons - General Questions | DSLReports Forums". Dslreports.com. 2011-09-27. Retrieved 2013-07-25.
- "Yahoo Mail Announces Unlimited Storage". March 2008.
- "Yahoo! Messenger and Mail...together at last!". Ymailupdates.com.
- "Gmail Agent API / Mail Notifier & Address Importer". Johnvey. Retrieved January 30, 2012.
- Yahoo! Mail blog[dead link]
- Yahoo with Yahoo Messenger Techcrunch Yahoo with Yahoo Messenger.
- Meyers, Michelle (December 17, 2005). "Yahoo mail beta gets mostly rave reviews". CNET. Archived from the original on August 8, 2007.
- [dead link]
- Guynn, Jessica (December 16, 2008). "Yahoo introduces features to make its services more social". The Los Angeles Times.
- "afp.google.com/article, Yahoo delivers new free email addresses". Google. June 18, 2008. Retrieved January 30, 2012.
- news24.com, Yahoo offers ymail, rocketmail[dead link]
- Wakabayashi, Daisuke (June 19, 2008). "uk.reuters.com, Yahoo introduces two new e-mail address domains". Uk.reuters.com. Retrieved January 30, 2012.
- Srivastava, Kakul. "Yahoo Mail Beta Was Announced On...". Retrieved 2011-05-22.
- David, McDowell. "Yahoo Mail Beta Includes...". Retrieved 2011-05-22.
- McDowell, David. "Yahoo Mail Beta Launched On October 26th 2010...". Retrieved 2011-05-22.
- Alexandra Chang (11 December 2012). "Yahoo Redesigns Mail Experience for Speed, Launches iPhone and Windows 8 Apps". Wired. Retrieved 26 December 2012.
- "Yahoo pushes all users to new e-mail". CNN.com. June 3, 2013. Retrieved June 2013.
- Aditya Dey. "Yahoo to Unveil its Upgraded eMail Service Soon". TechStake. Retrieved June 2013.
- Anger explodes at Yahoo Mail redesign disaster: Key functions removed or broken
- national http://www.usatoday.com/story/tech/2013/10/15/yahoo-email-redesign/2986433/ says "Yahoo email users not happy with redesign"
- Whitehouse, Kaja (2013-11-11). "Yahoo! users gripe over latest email change | New York Post". Nypost.com. Retrieved 2014-01-31.
- Blue, Violet (2013-12-12). "Yahoo forced to acknowledge Yahoo Mail problems in worst failure yet". ZDNet. Retrieved 2014-01-31.
- "Yahoo Mail Is a Consumer Disaster, But Company's Response - Kara Swisher - Media". AllThingsD. 2013-12-11. Retrieved 2014-01-31.
- Anderson, Lessley (2013-12-13). "Marissa Mayer apologizes for lengthy Yahoo Mail outage". The Verge. Retrieved 2014-01-31.
- Murphy, David (2013-12-14). "Yahoo CEO Marissa Mayer Apologizes for Yahoo Mail Outage | News & Opinion". PCMag.com. Retrieved 2014-01-31.
- "Yahoo CEO Mayer Apologizes For Mail Outage That She Says Affected 1% Of Users". TechCrunch. 2013-12-13. Retrieved 2014-01-31.
- "Yahoo Mail Outage". Huffingtonpost.com. Retrieved 2014-01-31.
- Mark Hachman (30 January 2014). "Yahoo acknowledges Yahoo Mail hack". TechHive. IDG Consumer & SMB. Retrieved 8 February 2014.
- [dead link]
- "Yahoo! – Universal Anti-Spam Policy". docs.yahoo.com.
- "AOL, Yahoo and Goodmail: Taxing Your Email for Fun and Profit | Electronic Frontier Foundation". Eff.org. Retrieved January 30, 2012.
- "Why am I getting "451 Message temporarily deferred" or "421 Message from x.x.x.x temporarily deferred" errors when sending mail to Yahoo!?". Yahoo!. 2007. Retrieved June 27, 2007.
- "As a sender, how can I ensure uninterrupted SMTP access and prioritized delivery?". Yahoo!. 2007. Retrieved June 27, 2007.
- "EastSouthWestNorth: The Case of Shi Tao". Retrieved January 21, 2007.
- "Yahoo 'helped jail China writer'". BBC News. September 7, 2005. Retrieved May 10, 2011.
- "Yahoo faces scrutiny in China case". MSNBC. Archived from the original on August 17, 2007. Retrieved August 8, 2007.
- "中文新聞頻道". Rthk.org.hk. June 29, 2006. Retrieved January 30, 2012.
- "BBC NEWS, US rebukes Yahoo over China case". BBC News. November 6, 2007. Retrieved January 30, 2012.
- Vindu Goel. "Yahoo may be a moral pygmy, but Congress is hardly better". MercuryNews.com. Retrieved January 21, 2007.
- "Yahoo chief apologizes to Chinese dissidents' relatives". MercuryNews.com. November 7, 2007. Retrieved January 21, 2007.
- Tom Lantos (November 6, 2007). "Statement of Chairman Lantos at hearing, Yahoo! Inc.'s Provision of False Information to Congress". Retrieved January 31, 2009.
- [dead link]
- Oates, John (February 20, 2006). "Yahoo!Mail bans Allah and Dirty Harry handles". The Register. Retrieved June 27, 2007.
- Oates, John (February 26, 2006). "Yahoo! unbans! Allah!". The Register. Retrieved June 27, 2007.
- "Egyptian Hackers Selling Zero-day Exploit of Yahoo Mail For $700". Retrieved November 29, 2012.
- "Yahoo Email-Stealing Exploit Fetches $700". Retrieved November 12, 2012.
- "Yahoo Mail hijacking exploit selling for $700". Retrieved November 26, 2012.
- "Yahoo Mail Hit By XSS Exploit Putting 400 Million Users At Risk". Retrieved January 13, 2013.
- "Telecom rush to fix hack". 3 News NZ. February 11, 2013.
- "Telecom defends email reset operation". 3 News NZ. February 18, 2013.
Telecom is defending a move to cancel the passwords of about 60,000 Yahoo Xtra customers which left some customers without access to their email accounts.
- "Telecom sticks with Yahoo email". 3 News NZ. April 5, 2013.
- "中国雅虎邮箱于2013年4月18日启动整体迁移". Yahoo.com.cn. Retrieved 18 April 2013.
- The China Yahoo! Mail Team. "China Yahoo! Mail is closing". Yahoo!. Retrieved 18 April 2013.
- "China Yahoo! Mail is closing". Yahoo!. Retrieved 18 April 2013.
- "NNFMP, Newman - from Usenet: alt.spam". Newsgroup: alt.spam. February 3, 2010.
- "NNFMP? (Third comment)". December 19, 2009.
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