I am getting a report from someone on my network that they are getting delivery failures when attempting to send an email from my Postfix server to the remote mail server. I see the message stuck on my Postfix servers queue:
CB87E778055 1337 Mon Nov 30 08:59:15 tprem...@iamghost.com (connect to a.mx.premore.net[198.186.193.20]: No route to host) b...@premore.net I am guessing that this is a problem with the remote mail server 'a.mx.premore.net' since my server is sending and receiving email just fine to every other destination. I then decided to do a MX lookup for this domain "premore.net" & see if there is anything wrong: ;; QUESTION SECTION: ;premore.net. IN MX ;; ANSWER SECTION: premore.net. 3093 IN MX 0 a.mx.premore.net. ;; ADDITIONAL SECTION: a.mx.premore.net. 3093 IN A 198.186.193.20 However my mail server wont send to this destination address and I have no idea why. Can someone tell me how I can better examine this situation to understand where the fault lies. Thank you!