Undelivered Mail Returned to Sender

From: Mail Delivery System <MAILER-DAEMON_at_FreeBSD.org>
Date: Sun, 3 Oct 2021 15:36:33 +0000 (UTC)
This is the mail system at host mx1.freebsd.org.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<freebsd-isp_at_mlmmj.nyi.freebsd.org> (expanded from <freebsd-isp_at_freebsd.org>):
    host mlmmj.nyi.freebsd.org[2610:1c1:1:606c::50:24] said: 554 5.7.1 Spam
    message rejected (in reply to end of DATA command)

attached mail follows:

This Message was undeliverable due to the following reason:

Your message was not delivered because the destination computer was
not reachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
tion parameters.

Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message was not delivered within 8 days:
Host is not responding.

The following recipients did not receive this message:

Please reply to postmaster_at_freebsd.org
if you feel this message to be in error.

Received on Sun Oct 03 2021 - 15:36:33 UTC

Original text of this message