We have a few domains that we are not able to send to. One of which is Comcast. I tracked the messages and everything is going along correctly except after "SMTP:Message Routed and Queued for Remote Delivery" the messages stop. It should go 2 more steps. (1. SMTP:Started Outbound Transfer of Message 2. Message transferred to abc.com)
Any ideas on why the messages would stop here? I looked in the que and the messages are just sitting there. I tried to do a "Force Connection" and it attempts to connect again but fails. They were able to email to these addresses before but now can't.