Hi to all, I have mail report made by the lire command and i see some strange things (or think they are). Here is a part of my log Summary of delivery for the most common domains. Sender's Domain Deliveries % Total % Domain Status -------------------------------------------- ---------- ------- -------- mkt-l21.net 4845 44.9 44.9 check_mail 4845 44.9 100.0 only-best-things.com 3633 33.7 33.7 check_mail 3633 33.7 100.0 The domains mkt-l21.net and only-best-things.com are unknown to me.... My pop3 port is open to the world but why are these domains always cheking their mail on my mail server? Is this a kind of atack to my machine ? How should i deny the access to these domains ? Thanks Joao Reis