The issue is known, a domain used for 68kmla.org's DNS MX record has gone offline, and it is set as the only allowed sending domain for 68kmla.org email in the DNS SPF record. So effectively nothing can send mail on behalf of the 68kmla.org domain now. https://68kmla.org/bb/index.php?threads/2024-11-10-forum-not-sending-email.48870/#post-548905