undelivered mail

[nordicscot]

I have only recently had emails that I replied to returned as undeliverable due to spam content. Both are from the same domain mymts.net
TYhe message says to contact the postmaster. How is that done?
This is the error message I receive.

host mx.mymts.net[140.238.150.69] said: 554 5.7.1 [VI-1]
Message blocked due to spam content in the message. (in reply to end of
DATA command)
Reporting-MTA: dns; smtp.vivaldi.net
X-Postfix-Queue-ID: CB472BD09A
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Mon, 17 Jan 2022 20:43:44 +0000 (UTC)
Action: failed
Status: 5.7.1
Remote-MTA: dns; mx.mymts.net
Diagnostic-Code: smtp; 554 5.7.1 [VI-1] Message blocked due to spam content in
the message.

[Ayespy]

@nordicscot That's a question for mymts.net. I would start by figuring out how to contact them.

[nordicscot]

@ayespy Thanks