Sam Varshavchik: FUD. 16. März 2008, abgerufen am 18. Dezember 2010: „My response to claims that Courier-IMAP is not a compliant IMAP server is very simple: there was no such thing as a “compliant” IMAP server, because Crispin's IMAP specification makes that an impossible goal.“
dovecot.org
Security. Timo Sirainen, abgerufen am 7. August 2013.