I am facing a problem of email delay, and wonder if anyone has any ideas of suggestion for me...
My office has an email server (Icewarp Merak Mail Server) setup, and we have another office location that has an Exchange 2003 Server setup. When we use our account under the Merak Mail Server to send emails, they get delivered very quickly to their destinations (gmail, yahoo, hotmail.... other domains..etc), but as we send email to our other office's Exchange 2003 server, the emails get stuck in the out-going queue. Sometimes it sends the mail out in few minutes, sometimes could take up to hours before they are delivered.
The emails don't get rejected, but just take long. I am not familiar with Exchange's policies, but could that be some sort of "black list", "gray list" that is prolonging the process? I personally think the Merak mail server is okay, since other mails send out without much problem... Does any experts have idea of what should I look into? Any particular functions in Exchange that I can drill down the problem to?
Thank you very much in advancd!