Delivery Temporarily Suspended
Hello, I am a postmaster for a high volume sending domain. We're receiving thousands "delivery temporarily suspended" messages for the majority of our send attempts and have a growing deferral queue for comcast.net recipients. Can you help us figure out why this is happening so we can start sending mail at regular rates again? We filled out the blocklist form, but it indicated none of our IPs are on a blocklist (and we don't see any BL codes in our logs). This is a production impacting situation for our comcast.net recipients, I can provide information on our domain and IP reputation, sending practices, etc if you need it.