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.