deliver reports (/var/lib/imap/socket/lmtp) failed: Connection refused

[Simon Matter]

> Hello Simon,
>
> I tried you suggestion and there are no more
> "Sep  3 07:45:59 srv1 deliver[20650]:
> connect(/var/lib/imap/socket/lmtp) failed: Connection refused"
> messages appearing in the error log file.
>
> Many thanks for your help.
>
> I run postfix chrooted so a hardlink pointing to
> /var/lib/imap/socket/lmtp was required in
> /var/spool/postfix/var/lib/imap/socket directory. This needs to be
> refreshed every time cyrus is restarted.

It's much easier to make lmtp not chrooted. Simply remove the chroot
option from lmtp service in master.cf. I don't think that's a big security
problem.

>
> But my collegaues told me that this is not the only problem. Cyrus
> pop3, pop3s, imap and imaps services become unavailable time to time.
> And only restart helps.
> Delivery from postfix to cyrus mailboxes via this new setup (direct
> lmtp) is OK during the outage of pop3, pop3s, imap, imaps service. The
> services don't die at the same time. Sometimes imap dies but pop3
> still works. Restart helps. It is really strange. It was a stable
> system before and nothing was changed. I could find only the following
> errormessages in the log files:
>
> Sep  8 01:35:00 srv1 pop3s[15591]: Fatal error: tls_start_servertls()
> failed
> Sep  8 01:37:09 srv1 imaps[15687]: Fatal error: tls_start_servertls()
> failed

Do you only have problems with pop3s and imaps, or also with pop3 and
imap? If it's only SSL/TLS, there yould be a problem with /dev/random and
you should try using /dev/urandom instead. Otherwise it could be that one
or more of your cyrus databases are corrupt. Did you try a reconstruct on
all you mailboxes?

Simon

>
> and
>
> Sep  8 02:17:47 srv1 cyrus-master[20423]: pop3 has -5 workers?!?
>
> There are many of such messages. I can access my mailbox using TLS
> without any problem.
>
> Any help would be appreciated.
>
> Thanks, Gyorgy
>
> Idézet (Simon Matter <simon.matter at invoca.ch>):
>
>>> Hello,
>>>
>>> We had a properly working postfix + cyrus-imap system till 23rd of
>>> July. Then messages like the below one started to appear in the log
>>> file.
>>>
>>> Sep  3 07:45:59 srv1 deliver[20650]:
>>> connect(/var/lib/imap/socket/lmtp) failed: Connection refused
>>>
>>> The postfix log shows:
>>>
>>> Sep  3 07:45:59 srv1 postfix/pipe[19972]: B88D01DC8EF8: to=<xxx@
>>> srv1.xxx.xx>, orig_to=<xxx at xxx.xx>, relay=cyrus-deliver, delay=2
>>> 49424, status=deferred (temporary failure. Command output: couldn't
>>> connect to l
>>> mtpd: Connection refused_ 421 4.3.0 deliver: couldn't connect to lmtpd_
>>> )
>>>
>>>
>>> Do you have any ideas what could happen? It worked fine before.
>>>
>>>
>>> cyrus.conf contains:
>>>
>>>    # at least one LMTP is required for delivery
>>> #  lmtp         cmd="lmtpd" listen="lmtp" prefork=0
>>>    lmtpunix      cmd="lmtpd" listen="/var/lib/imap/socket/lmtp"
>>> prefork=5
>>>
>>>
>>> postfix/master.cf contains:
>>>
>>> cyrus-deliver     unix  -       n       n       -       -       pipe
>>>    user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m
>>> ${extension} ${user}
>>>
>>>
>>> postfix/main.cf contains:
>>>
>>> mailbox_transport = cyrus-deliver
>>
>> Hi,
>>
>> I don't know why things suddenly fail but you shouldn't use the cyrus
>> transport anymore. You should use lmtp as a mailtransport directly. If
>> your postfix setup isn't somehow exotic you should be able to simply
>> switch with this config:
>> mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
>>
>> Maybe you could give it a try.
>>
>> Simon
>>
>>
>
>
>
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