I have under 200 mails (less than 1MB in size each) stuck in my outgoing queue with initial delivery dates between Thursday & Friday Last week. These mails originated from two users in the organization, other mails have since successfully sent out leaving this set behind.
I'm currently running Exchange server 2003 sp2 on a Windows server 2003 OS.
Exchange is part of a local domain mycomany.local
My email domain is mycompany.org
Exchange sends the mail out using mycompanynamemail.mysysadminsdomain.com
Using DNS to send mails, (Tested with a SMTP connector, didn’t work)
Info about each queue says “unable to open the message for delivery”
Tested the public IP of my exchange server using MXTOOLBOX(SMTP):
Not an open relay.
0 seconds - Good on Connection time
0.530 seconds - Good on Transaction time
OK – xxx.xxx.xxx.xxx. resolves to mycompanynamemail.mysysadminsdomain.com
OK - Reverse DNS matches SMTP Banner
Stopped services for Symantec Mail security & Symantec endpoint, didn’t solve
Ran exchange best practice which found 3 critical issues:
1 System has more than 1gig and I should make some registry changes to correct.
2 Offline address book has no replication set
3 My email domain certificate has expired since April of this year and may cause some connectivity issues
Followed recommendations and corrected 1 & 2 (Ran test again and they are not showing as issues anymore) However I did not fully understand item 3 and so that critical issue is still pending.
The event viewer is not showing any errors pertaining to the queue.
I tried putting the message id of some of the mails in the queue in message tracking to see where its stopping but nothing comes up (not sure if I’m doing something wrong there).
DNS seems to be ok; however any advice on test to ensure same is welcome.