Invalid PTR for yunohost STMP forum?


#1

Hello,
Sorry for write a message here, i not found category in forum for this request. This is for infra yunohost forum.

I would like to tell you about a configuration problem about sending emails from SMTP hosts in the forum. (i think). They have a invalid PTR record, causing the non-delivery of these mails.
91.224.148.92 -> PTR 91-224-148-92.tetaneutral.net -> Name or service not known
Is there a reason for this configuration?

My received log for sample:

Jan  1 23:13:00 zimbra postfix/smtpd[18385]: connect from unknown[91.224.148.92]
Jan  1 23:13:00 zimbra postfix/smtpd[18385]: Anonymous TLS connection established from unknown[91.224.148.92]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Jan  1 23:13:00 zimbra postfix/smtpd[18385]: NOQUEUE: filter: RCPT from unknown[91.224.148.92]: <reply+verp-XXXXXXXXXXXXXXXXXXXXXXXXXXX@forum.yunohost.org>: Sender address triggers FILTER smtp-amavis:[127.0.0.1]:10026; from=<reply+verp-XXXXXXXXXXXXXXXXXXXXXXXXXXX@forum.yunohost.org> to=<YYYYYYYYYYYYYYY@qth.fr> proto=ESMTP helo=<yunohost.org>
Jan  1 23:13:00 zimbra postfix/smtpd[18385]: NOQUEUE: filter: RCPT from unknown[91.224.148.92]: <reply+verp-XXXXXXXXXXXXXXXXXXXXXXXXXXX@forum.yunohost.org>: Sender address triggers FILTER smtp-amavis:[127.0.0.1]:10024; from=<reply+verp-XXXXXXXXXXXXXXXXXXXXXXXXXXX@forum.yunohost.org> to=<YYYYYYYYYYYYYYY@qth.fr> proto=ESMTP helo=<yunohost.org>
Jan  1 23:13:00 zimbra postfix/smtpd[18385]: NOQUEUE: reject: RCPT from unknown[91.224.148.92]: 450 4.7.25 Client host rejected: cannot find your hostname, [91.224.148.92]; from=<reply+verp-XXXXXXXXXXXXXXXXXXXXXXXXXXX@forum.yunohost.org> to=<YYYYYYYYYYYYYYY@qth.fr> proto=ESMTP helo=<yunohost.org>
Jan  1 23:13:00 zimbra postfix/smtpd[18385]: disconnect from unknown[91.224.148.92] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8

Best regards.


#2

Thanks for your report. We will investigate the problem (problem of RDNS).


#3

Problem fixed. 91.224.148.92 PTR yunohost.org -> 91.224.148.92
I see that it’s not a RFC standard, but in real world, many MTA (me too) reject smtp connection if DNS PTR is missing/invalid.

Thanks for your job!
Long life to Yunohost!