dovecot - Feb 2015 - how to run dovecot imap on separate server from postfix?

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
>>>
>>
>

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
>>>>
>>>
>>
>

Am 18.02.2015 um 18:15 schrieb 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
so just configure dovecot lmtpd to listen on a TCP port, port 24 is 
reserved for that - and don't open the port for any other machine as the 
postfix server

[harry at srv-rhsoft:~]$ cat /etc/services | grep -i lmtp
lmtp            24/tcp                          # LMTP Mail Delivery
lmtp            24/udp                          # LMTP Mail Delivery


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