We're in the process of moving to Dovecot. We're currently running UW-IMAP live with Dovecot 1.0rc7 on alternate ports for testing. We're set to switch to Dovecot tomorrow morning, and I'm sure I'll have lots of stupid questions once that happens. So I guess you can consider this message an introduction as well as a preemptive apology.
Our setup: our mailserver is a SunFire 880 running solaris 8. Inboxes are stored in /var/mail, home directories are in /home. Mailboxes are mbox. Both /home and /var/mail are NFS-mounted from a NetApp filer. Indexes are stored in /dovecot (this is a partition on local disk). We have about 500 users accesing their mail on this server. Supported clients are Outlook, Mac Mail, and Thunderbird (both PC and Mac). Many people access their mail via webmail (IMP Horde) instead of or in addition to using a normal client. We also have a few people who use Pine. Authentication is against the local shadow file.
Given this setup, do the following config lines seem sane?
login_process_per_connection = no login_max_connections = 256 default_mail_env = mbox:~/mail/:INBOX=/var/mail/%u:INDEX=/dovecot/%u namespace private { separator = / prefix = inbox = yes } # for backwards compatibility: namespace private { separator = / prefix = mail/ hidden = yes } namespace private { separator = / prefix = ~/mail/ hidden = yes } namespace private { separator = / prefix = ~%u/mail/ hidden = yes } mail_read_mmaped = no mmap_disable = no mmap_no_write = no lock_method = fcntl mbox_read_locks = dotlock mbox_write_locks = dotlock imap_client_workarounds = outlook-idle tb-extra-mailbox-sep pop3_uidl_format = %08Xv%08Xu pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
The namespace stuff came from http://wiki.dovecot.org/Namespaces - it was listed as a way to allow backwards-compatability with UW-IMAP.
So, anything there look like a bad idea? Any other config parameters I might want to tweak, tune, or otherwise take a look at?
So far dovecot's been pretty much trouble-free in our testing. But I have noticed some error messages in the logs. Anyone know what these mean? Are they anything I should panic over?
dovecot: Sep 25 09:34:19 Error: IMAP(cliftoja): UIDVALIDITY changed (1034876030 -> 1159201281) in mbox file /home/wcts/cliftoja/mail/Common installation codes dovecot: Sep 25 09:50:24 Error: IMAP(cliftoja): UIDVALIDITY changed (1156881790 -> 1159202005) in mbox file /home/wcts/cliftoja/mail/Junk dovecot: Sep 25 10:04:01 Error: imap-login: Master sent reply with unknown tag 180 dovecot: Sep 25 10:04:01 Error: child 1078 (login) returned error 89 dovecot: Sep 25 10:18:58 Error: login: tried to change state 0 -> 44 (if you can't login at all, see src/lib/fdpass.c)
Thanks in advance, and here's to (hopefully) a trouble-free Dovecot migration (hey, it can't be worse than UW-IMAP).
Ian Quorn System Administrator Whitman College Technology Services