We send confirmation of checking for flights, apparently users are mistyping your email.
Is it possible to block IP addresses via Postfix? On Tue, May 31, 2022 at 1:42 PM Wietse Venema <wie...@porcupine.org> wrote: > SysAdmin EM: > > I am checking the mail queue of my postfix server and I am seeing errors > in > > writing mail accounts, which refer to real domains of free mail providers > > such as hotmail, gmail, yahoo. > > > > BC2CC607AF 881286 Tue May 31 05:19:53 webchec...@kiusys.com > > (connect to hotmaul.com[54.159.98.68]:25: Connection > timed > > out) > > tc_gus...@hotmaul.com > > > > BAF5D60E06 3071 Fri May 27 03:32:45 r...@kiusys.com > > (connect to hormail.com[104.215.95.187]:25: Connection > timed > > out) > > negritaa...@hormail.com > > Why is your mail server sending mail to those addresses? > > - If the sender is remote, make sure that you are not an open relay. > > - If the sender is MAILER-DAEMON, search the maillog file for > BC2CC607AF or BAF5D60E06 and see why those messages were created. > > > Wietse >
