Question
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Topic
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NDR 4.4.7 Errors
LockedI have an exchange 2003 sp2 box that is able to receive fine for all email addresses. Sending email is fine for every other domain except to two domains that belong to @verizon.net and @rcn.com email addresses. I used to be able to send to them fine. I checked the queues and the emails sent to @verizon.net and @rcn.com seem to say smtp protocol error. I did a nslookup for verizon.net and got the mx record of relay.verizon.net, which is correct. I did a tracert and received up to 11 hops back, but with some that did time out 2 of the 3 times it tried contacting one of the destinations. I checked the route of the smtp message with message tracker on exchange 2003 and it showed up that it tried multiple attempts to connect to multiple smtp servers that start with sv3pub.verizon.net up to sv22pub.verizon.net. I did notice that my logs noted down a DCOM with event ID 10009 “DCOM was unable to communicate with the computer ” ” using any of the configured protocols.” Does anybody have a clue what is going on? Thank you in advanced for any help available.