Am 17.02.2013 11:08, schrieb Timo Sirainen: >> What parts of Dovecot would be involved? I'm curious because my production >> mailservers use identical hostnames in their jails ever since running >> Dovecot (starting 1.x). > > Mainly that maildir filenames are used as GUIDs. If two have the same > name, they are assumed to be identical. That's why the maildir filenames > include the hostname in them, to make sure that the GUID is different > even if two mails happen to be delivered at exactly the same time with > the same PID and same size to two different servers. So pretty unlikely, > but better to be safe. :) > > There may be some other features that require unique hostnames in > future. Anything where multiple Dovecot servers need to communicate > between each others. If some day there is such generic communication > between Dovecot servers I'm planning on enforcing this requirement.
Postfix is enforcing this since forever "Greeted me with my own hostname" hostnames inside a network should always be unique
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