Sorry about your experience with the postfix mailing list. I found them
quite helpful in the past. If you want a bad experience as a newbie, try
the spamassassin list!
On 16/11/2016 17:28, Davide Marchi wrote:
> <snip>
> FWIW, if you put:
>> smtpd_client_restrictions = reject_unknown_reverse_client_hostname
>>
>> in your /etc/postfix/main.cf, postfix will drop all these connections
>> from unknown. [..] You can test by using the following
>> instead:
>>
>> smtpd_client_restrictions = warn_if_reject
>> reject_unknown_reverse_client_hostname
>>
>> This will log a failure but not reject.
>>
>> Even if you do use smtpd_client_restrictions,
> Well, If I meant to use the "smtpd_client_restrictions"do you thinkyou
> couldgive me any troublewithemail users?
> Andin the eventitcreatedthese problemsI think it'svery limited cases,
> right? What is your experience about?
I know I am missing a particular e-mail and I don't know why. It
probably is not this. If you're nervous, just put in:
smtpd_client_restrictions = warn_if_reject
reject_unknown_reverse_client_hostname
It will give you a warning in the logs and not cause a rejection. Remove
the "warn_if_reject" when you become comfortable. It should stop
mis-configured mail-servers as it is a mandatory requirement. Typical of
the people who have misconfigurations are some home users who don't know
any better, lots of dynamic IP's (who should not really be sending
e-mails) and spammers where they are relaying through compromised IP's
which can often be dynamic. But it is not exclusively dynamic IP's which
don't have a a reverse DNS record and some dynamic IP's do have a
reverse DNS record. Try googling
"reject_unknown_reverse_client_hostname" for discussions on the subject.
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