Hi roseway
Many thanks
Sorry, I should have been more clear sorry and mentioned it because you were updating your package
Some mail servers would only use tlsv1.2, and drop anything lower (same as when SSLv3 was dropped)
I think the majority though, would still allow tls1 or 1.1, but thought I had better mention it in case you were not aware
Lastly, tlsv1.3 is coming out of beta, but this will take time to filter into systems
I hope that helps a little and sorry if you were already aware
Many thanks
John