routed messages are stuck in queue folder
Posted on 2009-12-22
I am sending mass email to my opt-in members of my business, around 30000 recipients. I am routing all mails to a smart host (an exchange 2003 server in the same network) from a virtual smtp on Win 2003 server, IIS 6). All mails go to the exchange server and be in the queue in a reasonable time (c:\program files\exchsrvr\mailroot\queue).
Once messages are in the queue, the exchange server starts sending mails immediately, but slow. it takes a day to send about 20000 messages. somehow, about 10000 emails are stuck in the queue and don't go out, still staying there for a few days.
Can someone help me to solve this problem? Thanks.