Hello everyone,
I have a postfix server (with amavis and clamav) that receives emails for
other domains. When it gets a mail for a non-existent email, it accepts it
anyways because it doesn't have the list of valid email addresses.
In other words, I'm generating backscatter and I want to avoid it.
One solution could be to never return a mail delivery notification for
external email, but I think that's not recommended, isn't it?
I'm already discarding all emails with viruses and using blacklists.
Does anybody knows any other solution?
Thanks in advance,
-- Diego.
