Hi, just a single server setup, Win2003, Ex2003, and everything used to be working for over a year. Had to upgrade to the latest service pack, as there was a problem with starting ESM, and since then, no mail will leave the local queue when sent to external addresses. Internal mail works just fine, and incoming mail is fine as well - it's solely getting mail to external addresses. I've tried looking around for a few hours, tried some troubleshooting pages around the net, and everything /seems/ fine - but it's not, obviously, hence my post here. I'm not exactly Mr.Exchange, but I'd appreciate any ideas from those who are (or Mrs., of course :).
Thanks for any help in advance. Any info you need, just let me know.