dovecot.org/releases/1.2/dovecot ... tar.gz.sig
mbox users really should upgrade, because by sending a message with a huge header you could basically cause a DoS (this problem exists only with v1.2.x, not with v1.0 or v1.1).
- mbox: Message header reading was unnecessarily slow. Fetching a huge header could have resulted in Dovecot eating a lot of CPU.
Also searching messages was much slower than necessary.
- mbox, dbox, cydir: Mail root directory was created with 0770 permissions, instead of 0700.
- maildir: Reading uidlist could have ended up in an infinite loop.
- IMAP IDLE: v1.2.7+ caused extra load by checking changes every 0.5 seconds after a change had occurred in mailbox
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