On Fri, 08 Nov 2019 11:23:17 -0800, Jared Geiger said:
What likely happened is that messages were queued on host to go out, SMPP binds go down, queue fills up, host crashes. Then someone realizes the host is down and brings it back up and the queue empties when the load is low.
What I've seen happen more often than that: Server goes partly belly-up, queue fills up. Backup process runs, backing up the queue. (Optionally here: Reboot the server and lose the queue). Much later, the server hits another issue that requires recovering from backups - and they restore a truly ancient copy. I recently got a replay of a bunch of email messages from 2002. I admit not at all understanding what procedure failures (multiple) resulted in reloading a mail spool from 2002.