On 06.11.2020 13:48, Wietse Venema wrote:

Wietse
> That is a configuration mistake. Postfix should not receive mail
> for a deleted user.
maybe you dont understand me I mean this example:

<otheru...@porxxxxx.org>: host spike.porcxxxxx.org[xxx.xxx.189.2] said: 550
    5.1.1 <otheru...@porcxxxx.org>: Recipient address rejected: User unknown
    (in reply to RCPT TO command)
I send e-mail to user and I send to Your server

And let's assume I do not accept this information and limit it, for example, by 
10 per hour....

>
>> or user have quota
> There are policy plugins or other solutions to block mail for
> over-quota users, depending on what mail delivery method you use.
>
>> - my server (Mailer-daemon) sends returns -
>> and external hosting limit incomming e-mail per IP
> So this is only a problem with sending MAILER-DAEMON messages?
>
> Please fix your Postfix configuration to not receive mail for a
> deleted or over-quota user.
>
>       Wietse

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