how to run dovecot imap on separate server from postfix?

[Robert Fantini]

I'm trying to figure out the exact line to put to /etc/postfix/main.cf

for local lmtp deliver we use:
mailbox_transport = *lmtp:unix:private/dovecot-lmtp*

for remote  it is supposed to be:* lmtp:host:port*

yet at the remote  lmtp does not use ports.  UNIX domain sockets are used
instead:

netstat  --listening --programs|  grep lmtp
unix  2      [ ACC ]     STREAM     LISTENING     8457     3696/dovecot
   /var/run/dovecot/lmtp
unix  2      [ ACC ]     STREAM     LISTENING     7998     3834/master
    private/lmtp
unix  2      [ ACC ]     STREAM     LISTENING     7630     3696/dovecot
   /var/spool/postfix/private/dovecot-lmtp


Is there a different setting for lmtp using 'domain sockets' ?




On Tue, Feb 17, 2015 at 5:02 PM, Robert Fantini <robertfantini at gmail.com>
wrote:

> Hello again Reindl Harald
>
>   I always thought Wietse Venema was only as smart as me ;-)
>
>  seriously thank you for the help.
>
> On Tue, Feb 17, 2015 at 4:57 PM, Reindl Harald <h.reindl at thelounge.net>
> wrote:
>
>>
>> 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
>>>>
>>>
>>
>