Huge thanks!! Em sex., 6 de nov. de 2020 às 13:15, Patrick Laimbock <patr...@laimbock.com> escreveu:
> On 06-11-2020 13:48, Rafael Azevedo wrote: > > Hi there, > > > > This is an old issue and I believe it has already focused on older > > discussions. > > > > I'm receiving SPAM from my own address. > > > > Checking server logs, user is not authenticating and the only way this > > spammer can play a trick is by sending an email to its own address (ie: > > from raf...@mydomain.com <mailto:raf...@mydomain.com> to > > raf...@mydomain.com <mailto:raf...@mydomain.com>). > > > > Is there a way to avoid this practice ? > > > > Thanks in advance. > > > > BR, > > Rafael > > Hope I get this right. In main.cf you can put a section: > > smtpd_sender_restrictions = > ... > check_sender_access hash:/etc/postfix/sender_access > ... > > And in /etc/postfix/sender_access you then add your domain (see man 5 > access for more information): > > mydomain.com REJECT You are not mydomain.com > > Then run postmap > # postmap /etc/postfix/sender_access > > And finally > # postfix reload > > Note that this only works for MAIL FROM, see > http://www.postfix.org/postconf.5.html#smtpd_sender_restrictions > http://www.postfix.org/postconf.5.html#check_sender_access > > Best, > Patrick >
