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
