Hello,lists,

Some spammers use SMTP bounce to send lots of spams to our systems.For 
example,they send spams to some mail servers which are lost for antispam 
mechanism (They may send to the uncorrect users on those mail 
servers).Surely,these spams are faked with header,whose return-path are facked 
as our system's real user accounts.Then,those mail servers bounce the spams to 
our users' mailboxes.While we can't reject those mail servers,although they are 
abused by spammers really.
How can I deal with these spams?Thanks.

Jeff


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