Guys, According to this referente [1], one of the principal operations is to discard or quarantine the message. How should the MAIL FILTER respond to postfix so it could do such actions?
Huge thanks, BR, Rafael [1] - http://www.postfix.org/FILTER_README.html Em ter., 29 de dez. de 2020 às 09:37, Rafael Azevedo <raf...@gmail.com> escreveu: > Hi there, > > I've noticed that one of our servers is receiving a huge amount of > unauthorized requests. > > User connects to our server and tries to send an email to any destination. > Our servers denies the message because user is not authenticated. Then, a > bounce is generated to the source address, which was fake and turns to be > the final destination, so at the end, the email is actually sent as a > bounce, proliferating lots of spam. > > Is there a way to avoid this? > > Thanks in advance. > > BR, > > Rafael >
