What is between Postfix and the internet:
- A load balancer?
- A firewall that inspects TCP sessions?
Question 1: were there other SMTP sessions during this time frame,
and did they have timeouts or 'unknown' commands?
The next one timed out after 306 seconds, where 300s is expected.
2022
On Mon, Aug 08, 2022 at 01:21:01PM +, White, Daniel E. (GSFC-770.0)[AEGIS]
wrote:
> 2022-08-05T17:27:37.326857+00:00 MAILRELAY postfix/smtpd[69606]: connect from
> unknown[SAME_CLIENT_IP]
> 2022-08-05T17:32:43.057669+00:00 MAILRELAY postfix/smtpd[69606]: timeout
> after CONNECT from unknown
A customer sent 6 test messages in a space of about 30 minutes.
5 out of 6 never appeared in the maillogs of 3 different relays
I am still trying to get more detail from them.
The one that did go through showed, IMHO, strange behavior:
2022-08-05T17:27:37.326857+00:00 MAILRELAY postfix/smtpd[6960
