have several @ntlworld.com addresses, all work flawlessly.
Set up a new ****@virginmedia.com address, can receive IMAP email but cannot send email. Crap
Apple M1, native email application which has my iCloud, gmail and ntlworld accounts all working perfectly.
All SMPT settings checked, re entered, account cleared and re added onto MAC, still no joy. Ran through Spamhaus, no issues (why would they be its a brand new account)
Read loads of forums, no joy, what else can I try. Thanks