how to run dovecot imap on separate server from postfix?

[Reindl Harald]

Am 17.02.2015 um 22:51 schrieb Robert Fantini:
> I want to make sure that the postfix delivery does not give up trying to
> get the email delivered when the  lmtp host is not reachable.      I do not
> just want to assume that the default settings are correct for us.
>
> Are there  postfix or other settings which can be checked and adjusted?

postfix was *not* written by a moron and hence in any case any mail in 
the queue will be re-tried until "maximal_queue_lifetime" is reached

there is no difference if lmtp is a unix socket or on the network 
because nobody can say for sure that the lmtpd on localhost is reachable 
365/7/24 and hence any sane MTA handles errors properly

> On Tue, Feb 17, 2015 at 4:37 PM, Reindl Harald <h.reindl at thelounge.net>
> wrote:
>>
>> Am 17.02.2015 um 22:29 schrieb Robert Fantini:
>>
>>     we are using version 2.2.13 on debian.
>>>
>>>    currently imap  runs on the same system as  postfix , spamassassin and
>>> other mail related software.
>>>
>>>    I'd like to move dovecot imapd  and mail storage  to its own system.
>>>
>>>    I've search google and wiki and could not see how to do so.
>>>
>>>    could someone please point me in the direction to that done?  I like
>>> reading documentation..
>>>
>>> here is more info on our set up:
>>>
>>> postfix:
>>> # grep dovecot /etc/postfix/*
>>> /etc/postfix/main.cf:mailbox_transport = lmtp:unix:private/dovecot-lmtp
>>> /etc/postfix/main.cf:smtpd_sasl_type = dovecot
>>>
>>
>> just configure postfix to use "lmtp:host:port" of the dovecot machine

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