I tried assgining the following ipsec policy to Imail server on win2k:
 
1.    ban all
2.    permit TCP port 25 (smtp) both directions
3.    permit TCP port 110 (pop) both directions
4.    permit port TCP 53 (dns) bot5h directions
 
After assigning the policy the server could not do DNS lookups and delivery of mails outside the domain failed.
 
ANY COMMENTS?
 
regards,
 
Parimal

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