Thank you for the reply.
On 05-12-2013 15:26, Charles Marcus wrote:
On 2013-12-05 7:50 AM, Andreas Kasenides <andr...@cymail.eu> wrote:
smtpd_client_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unknown_client
permit
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
meant)...
The config is exactly as above and the system is <2.3 when some params
had a slightly
different name.
It is well known to block legitimate mail.
Use reject_unknown_reverse_client_hostname instead, it is safe to
use.
I will consider this since we have been rejecting messages now and then
from legitimate sources.
Also, postconf -n output is preferred to copy/pastes or manually
typing contents of $random_config_file...
While postfonf -n has its strong merits I see no reason to include tens
of lines
of configuration params to explain just a single and simple point
Thank you anyway for the hints.
Andreas
--
Best regards,
_CHARLES_
