ISP does not allow send mail on port 25
Posted on 2008-10-09
I have a customer that recently switched ISP and this ISP requires sending of e-mail using port 465 and username and password. they are a reseller of verizon so I would imagine that configs for Verizon would work similarly. What I was wondering is what do I need to do in Exchange 2003 to make it send e-mail through, say a smarthost or any way that it will send e-mail with this ISP. I have configured a smarthost to forward mail to their mail server and also changed the port to the required 465. But it just seems to go and sit in the queue without delivering. After a time I would get a NDR as follows: email@example.com on 6/29/2008 11:47 AM
Could not deliver the message in the time limit specified. Please retry or contact your administrator.
I have read a number of links and articles, some stating that this cannot be done with Exchange 2003. I thought I would put it to the test. It just seems to me like there should be a way.
P.S. The ISP says that we are the first to do this with them, so they are very little help.