Am 15.07.2017 um 23:30 schrieb Doug Hardie:
I tried to setup statistics as shown on the Statistics wiki page. I encountered a problem with the mail_plugins for imap. in the protocol imap configuration the wiki shows adding imap_stats to mail_plugins. When I do that, dovecot stops authenticating and throwing error messages:
Jul 15 12:47:46 mail dovecot: imap(doug)[10.0.1.251]<osGhcGBUmsgKAAH7>: Error: Couldn't load required plugin /usr/local/lib/dovecot/lib95_imap_stats_plugin.so: Plugin stats must be loaded also (you must set: mail_plugins=$mail_plugins stats) Jul 15 12:47:46 mail dovecot: imap(doug): Error: Internal error occurred. Refer to server log for more information.
Changing that line to just add stats to mail_plugins resolves the problem. Hopefully that is an error in the wiki... However, in looking at the stats, I don't ever see any values for any of the auth_ values. They all show zero even though there have been numerous authentications by dovecot and postfix.
Doug, according to the wiki it should be:
mail_plugins = $mail_plugins stats protocol imap { mail_plugins = $mail_plugins imap_stats }
It sounds as if you were missing the first line in global config scope.
For auth stats add to your config: auth_stats = yes
Thomas