[Mimedefang] Blocking spam senders using IPTables?

[Alberto da Silva]

Greetings,

You run the risk of starting a DoS attach against your own box.
The RFC's state that senders should keep trying for ~5 days

Quote "
: Chances are that you would get more DoS by new connections constantly
: coming in, than by 5xx responses causing at least protocol-compliant
: senders to give up.
"
Search for tcp wrappers in comp.mail.sendmail for details

Alberto