Hello all, I have a problem with one of my email servers sending to comcast.net. Every day the mail queue backs up for comcast.net to the point where I have around 1700 emails in the queue build up over the course of the day then eventually get flushed after close to 8 hours in queue. What can I do to help ensure prompt delivery ? DKIM and DMARC are already in place as well as being signed up for the return path FBL. The reputation for this IP is great. I do not know what else I could do so hopefully someone on the list can help me out.
Thanks, -R. Prihoda
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