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