Re: sometime in the night, fetchmail 6.5.0beta6 heard a bump

Antispam makes it harder these days to send without
a body-from (which could perhaps have had non-printables
in it, or been otherwise mangled). Sending without envelope-from
is even harder. Regardless, you note there was one sitting
at shentel waiting for you, but that it was deleted.

So can test by using 'msmtp' program to inject such a piece
of by memory crafted mail into shentel for further testing.

https://github.com/marlam/msmtp-mirror

Or use any imap server to serve such a test
message file locally to fetchmail.