For several days now I am getting the following Mailer-Daemon message when I try to email anyone with a Btinternet.com address. Can anyone explain please. Other emails are being delivered ok!
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients was aborted after 24.9 hour(s):
*********** @btinternet.com
Reason: The following message to **********@btinternet.com was undeliverable.The reason for the problem: Maximum Retry Queue Age Reached