Bouncing list messages

From: Per olof Ljungmark <peo_at_nethead.se>
Date: Sun, 13 Aug 2023 17:03:23 UTC 
Just checking if anyone else is seeing this, some but not all, messages 
are blocked by zen.spamhaus.org

For example,

Aug 13 18:25:39
connect from mx2.freebsd.org[96.47.72.81]

Anonymous TLS connection established from mx2.freebsd.org[96.47.72.81]: 
TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange 
X25519 server-signature ECDSA (P-384) server-digest SHA384

NOQUEUE: reject: RCPT from mx2.freebsd.org[96.47.72.81]: 554 5.7.1 
Service unavailable; Client host [96.47.72.81] blocked using 
zen.spamhaus.org; 
from=<freebsd-arm+bounces-2914-peo=nethead.se@FreeBSD.org> 
to=<peo@nethead.se> proto=ESMTP helo=<mx2.freebsd.org>

But at Aug 13 18:11:02 a message from the same list, same mx, got 
through so it is sporadic.

and

"Hi, this is the Mlmmj program managing the <freebsd-arm@FreeBSD.org>
mailing list.

Some messages to you could not be delivered. If you're seeing this
message it means things are back to normal, and it's merely for your
information.

Here is the list of the bounced messages:
- 2914"

is obvioulsy also delvered ok.

Per