Mailscanner and DNS

[John Rudd]

Does MailScanner cache resolver information and then do lookups directly?

Specifically, if I change the DNS server information in resolv.conf, do 
I need to restart MailScanner?

We've taken certain name servers out of our resolv.conf, and yet we're 
still seeing traffic to those servers from our MailScanner machines.  
I'm not sure if this is a problem with the resolver, sendmail, or 
MailScanner.