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From: Jeroen Geilman (jeroenadaptr.nl)
Date: Sat Dec 07 2013 - 18:59:34 CST
On 12/06/2013 08:19 AM, Andreas Kasenides wrote:
> Thank you for the reply.
> On 05-12-2013 15:26, Charles Marcus wrote:
>> On 2013-12-05 7:50 AM, Andreas Kasenides <andreascymail.eu> wrote:
>>> smtpd_client_restrictions =
>>> Obviously this rejects any requests where the DNS (forward or
>>> reverse) fails.
>>> I am under increasing pressure to change this apparently because
>>> other email admins
>>> have their mail servers misconfigured resulting in "lost" emails. I
>>> believe this is
>>> in violation of RFC 5321 but correct me if I am wrong.
>> Do not use reject_unknown_client_hostname (I presume this is what you
> The config is exactly as above and the system is <2.3 when some params
> had a slightly
> different name.
Current postfix versions all support reject_unknown_reverse_client_hostname.
Please upgrade to something that's not abandoned.