Eddie, The quick answer is that you leave all ports open for outgoing and restrict all but required ports for incoming.
Your translation in your firewall will handle the DNS item and it will basically be a non-issue. --Jonathan Moore --- eddie pang <[EMAIL PROTECTED]> wrote: > Question... > > If we were place our new email server behind a > secure NAT, I assume all > incoming emails will process okay, because of the > external to internal NAT > translation... > > My question is; isnt all outgoing email suppose to > also be sent from the > same IP address as specified from the MX record? or > is the external IP from > the firewall okay? > > The reason is, I want to move our existing email > server from the exposed > internet (running a s/w firewall) behind a h/w > firewall. I'm just afraid > that all outgoing emails will be rejecting because > our MX record and all > outgoiing traffic through the firewall will not be > the same... > > Many thanks in advance. > eddie :) > __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
