Yes, you are correct. That is the cause of the problem. A quick entry of my machine in the hosts file sorted that one out!
I'm just baffled why I have never experienced this issue before. Thank you everyone. -- View this message in context: http://postfix.1071664.n5.nabble.com/Slow-sending-of-email-tp65252p65257.html Sent from the Postfix Users mailing list archive at Nabble.com.