I forgot to add part of the log from the time of the incident.
2023-10-14 19:21:14
INFO
postfix/qmgr [1179220]
97A991960717: removed
2023-10-14 19:21:14
INFO
postfix/smtp [1232627]
97A991960717: to=<
[email protected]>, relay=gmail-smtp-in.l.google.com[64.233.165.26]:25, delay=1.4...