RE: [cobalt-users] Mailscanner not getting viruses all the time

["Dan Kriwitsky" <list3@xxxxxxxxxxxxxxxxxxxx>]

> 
> For example, if the Internet delivers your customer domain email with 
> primary MX set as the primary MX record in DNS and the 
> secondary MX as a 
> backup server, then it would be possible for the primary MX 
> to reject the 
> mail connection based on an RBL check but the sending server 
> doesn't give 
> up. It then tries to deliver to the next priority MX server 
> listed by DNS. 
> In your example this would mean the secondary MX then I 
> presume it would 
> miss out the virus checks.
> 

It's already been seen that spammers are deliberately targeting the
secondary MX as many sites do not run RBL or virus checks there.
-- 
C2003 Dan Kriwitsky

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