On May 23, 2019 1:38 AM, mabi <m...@protonmail.ch> wrote:
>
> Hello,
>
> I upgraded my OpenBSD 6.4 MX server running OpenSMTPD 6.4 to OpenBSD 6.5 
> running OpenSMTPD 6.5 but unfortunately had to revert back to 6.4 because 
> mail delivery to Dovecot using LMTP did not work anymore. Is it possible that 
> LMTP mail delivery is broken in OpenSMTPD 6.5?
>
> In my smtpd.conf file I use:
>
> action "lmtp_dovecot" lmtp "/var/dovecot/lmtp" rcpt-to virtual <vusers>
>

Make sure dovecot is running and listening at that path. Netcat should help.

> The relevant error log entry of OpenSMTPD is:
>
> May 22 21:49:08 mx1 smtpd[45250]: dfc2d91c04922d88 mda delivery 
> evpid=7f51132de0fd58db from=<some...@domain.tld> to=<m...@mydomain.tld> 
> rcpt=<m...@mydomain.tld> user=vmail delay=1s result=PermFail stat=Error 
> ("mail.lmtp: LMTP server error: 451 4.4.0 Remote server not answering 
> (connect)")
>
> In the log file of Dovecot I don't see anything particular but just some 
> information about the connection:
>
> May 22 21:49:07 mx1 dovecot: lmtp(61415): Connect from local
> May 22 21:49:08 mx1 dovecot: lmtp(61415): Disconnect from local: Remote 
> closed connection (state=READY)
>
> I ran a tcpdump on port 24 (Dovecot LMTP port) and could see that the mail 
> delivery never goes past these two first commands:
>

You are delivering to a Unix socket not tcp.

> LHLO mx1.mydomain.tld
> XCLIENT HELO=localhost TTL=5
>
> In fact it seems to be trying in a loop to connect and always run LHLO and 
> XCLIENT but never goes further to actually issuing the mail.
>
> Running "ps auxwww | grep lmtp" shows me that mail.lmtp is running but never 
> manages to deliver the mail successfully:
>
> vmail    19798  0.0  0.1   248  1172 ??  I     10:03PM    0:00.00 
> /usr/libexec/mail.lmtp -f some...@domain.tld -d /var/dovecot/lmtp 
> m...@mydomain.tld
>
> Any ideas what could be going wrong here? or is it possibly a bug in 6.5?
>
> Best regards,
> Mabi
>
>
>

I haven't gotten around to upgrading yet, so I can't confirm if it's broken. 
However, I doubt it since there haven't been any other reports I've seen.

Edgar
>
>
>
>
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