Hi,
I experienced a problem sending mail to a @fsfe.org adress (which seem to forward to mailbox.org)
fsfe2@mailbox.org (expanded from xxx@fsfe.org): host mx2.mailbox.org[80.241.60.215] said: 554 5.7.1 Service unavailable; Client host [217.69.89.151] blocked by RBL; Your e-mail service was detected by spam.over.port25.me (NiX Spam) as spamming at Sun, 16 Oct 2022 11:53:13 +0200. Your admin should visit https://www.nixspam.net/lookup.php?value=217.69.89.151 (in reply to RCPT TO command)
Can you inform the mailserver responsible person?
fyi & kind regards,
Gabriele