My Webserver has been denied from Yahoo! and every time an email is sent to a Yahoo! server, it fails and replies with:
Connecting to mta7.am0.yahoodns.net [18.104.22.168]:25 ... connected SMTP<< 421 4.7.1 [TS03] All messages from 108.xx.xxx.xx will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
It seems that Exim will continuously try and try again to deliver these bounced emails.
What can I do to disable this feature?