Date: Mon, 17 Feb 2020 11:45:46 -0500 From: Michael Butler <imb@protected-networks.net> To: hostmaster@freebsd.org Subject: lame reverse DNS? Message-ID: <db42c2a5-f42e-ee4a-5cf8-0136e0867105@protected-networks.net> Resent-Message-ID: <262319f3-852e-70c1-d0e2-a4b8fb31eb18@protected-networks.net>
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Seems there's an issue with freebsd.org's reverse DNS resulting in refused email, e.g. Feb 17 08:58:54 mail postfix/smtpd[41811]: NOQUEUE: reject: RCPT from unknown[2610:1c1:1:606c::19:2]: 550 5.7.25 Client host rejected: cannot find your hostname, [2610:1c1:1:606c::19:2]; from=<owner-freebsd-ports@freebsd.org> to=<imb@protected-networks.net> proto=ESMTP helo=<mx2.freebsd.org> Feb 17 10:55:52 mail postfix/smtpd[82117]: NOQUEUE: reject: RCPT from unknown[96.47.72.81]: 550 5.7.25 Client host rejected: cannot find your hostname, [96.47.72.81]; from=<owner-freebsd-ports@freebsd.org> to=<imb@protected-networks.net> proto=ESMTP helo=<mx2.freebsd.org> Feb 17 11:11:15 mail postfix/smtpd[83299]: NOQUEUE: reject: RCPT from unknown[96.47.72.81]: 550 5.7.25 Client host rejected: cannot find your hostname, [96.47.72.81]; from=<owner-freebsd-ports@freebsd.org> to=<imb@protected-networks.net> proto=ESMTP helo=<mx2.freebsd.org> Looking more closely .. /home/imb> host 2610:1c1:1:606c::19:2 Host 2.0.0.0.9.1.0.0.0.0.0.0.0.0.0.0.c.6.0.6.1.0.0.0.1.c.1.0.0.1.6.2.ip6.arpa not found: 2(SERVFAIL) /home/imb> host 96.47.72.81 Host 81.72.47.96.in-addr.arpa not found: 2(SERVFAIL) imb
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