4 ms·
It sounds like you've already figured it out. You were requiring TLSv1.2 but some other remote mail systems didn't support it and were unable to fallback and,
by jlgaddis 8y ago
It sounds like you've already figured it out.
You were requiring TLSv1.2 but some other remote mail systems didn't support it and were unable to fallback and, as a result, couldn't negotiate a secure connection.
Or did I miss something?