Timo Sirainen

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Timo Sirainen by the Tagus river in Lisbon

Timo Sirainen, born 1979, is a Finnish programmer also known under the handles "cras" and "tss". Sirainen is the original author of the IRC-client Irssi and the POP/IMAP server Dovecot. Sirainen lives in Tampere, Finland.

In 2006, Sirainen began studying biotechnology at the University of Tampere.

He was formerly working for Rackspace Email & Apps[1] (formerly Mailtrust), where he continued the development of the Dovecot POP/IMAP server.

Since May 2011 he runs his own company offering commercial support for Dovecot.


  1. ^ "Creator of Dovecot Joins Mailtrust". Mailtrust's Blog. Retrieved 2009-02-09.