I am unable to send messages from from one of my accounts.
Receiving message undeliverable
Reporting-MTA: dns; mx-out.tt.xion.oxcs.net
X-Postfix-Queue-ID: 9E75CA82EB4
X-Postfix-Sender: rfc822; ********man1@talktalk.net
Arrival-Date: Thu, 6 Feb 2025 14:55:55 +0000 (UTC)
Final-Recipient: rfc822; ********man1@talktalk.net
Original-Recipient: rfc822;********man1@talktalk.net
Action: failed
Status: 5.5.1
Remote-MTA: dns; mx002.tt.xion.oxcs.net
Diagnostic-Code: smtp; 550 5.5.1 Recipient rejected - OXSEU012_403 -
https://postmaster-oxseu.vadesecure.com/inbound_error_codes/#_403
I would much appreciate if you could help resolve this issue
