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If you want to leave your new server as-is, and not route mail through your Internet Mail Connector, then you should make sure that there are good DNS records for your new server, including matching A and PTR records (generally guaranteed when we add a DNS entry to the central servers), plus an MX reference of some sort to your new server. The latter will ensure that your mail server is whitelisted on the central mail system. I think most everyone here knows this already, but you can request updates to the central DNS by e-mailing "[log in to unmask]". Doug On Wed, Nov 07, 2007 at 01:55:25PM -0500, Javier Ornelas wrote: > We recently added a new Exchange Server (2003) to our Exchange 2003 > organization. Our Internet Mail Connector is still on our original mail > server and we added the new server as a bridgehead server to this > Internet Mail Connector. The users that have mailboxes hosted on the > new Exchange server can send e-mail outbound to the internet without > trouble with the exception of two domains so far. They are aol.com and > Comcast.net. > > > > It appears from headers that I have looked at that the accounts being > hosted on the new e-mail server are going directly out to the internet > from the new box with SMTP and not going through the Internet Mail > Connector on our original mail server. I had thought that all internet > bound (outbound) e-mail would route through the IMC on the original mail > server, but I was incorrect. > > > > For those mailboxes that are still on the original Exchange server, > e-mailing aol.com and Comcast.net isn't an issue. > > Any thoughts or advice? > > > Thanks, > > > > Javier Ornelas > > MSU Health Information Technology > > Network Services/Support > > A118K Clinical Center > > East Lansing, MI 48824 > > (517) 355-6531 > > (517) 432-4774 fax > > > -- Doug Nelson, Network Manager | [log in to unmask] Academic Computing and Network Services | Ph: (517) 353-2980 Michigan State University | http://www.msu.edu/~nelson/