On 7/08/19 2:02 AM, Larry Stone wrote:
I use MacOS Mail and for receiving, I just have “Automatically manage
connection settings” checked and it just works (but that’s really a Dovecot
question, not Postfix).
For sending, I do not have “Automatically manage connection settings” checked.
Port is 587, Use TLS/SSL is checked, and Authentication is Password. But the
correct settings for your server may be different.
Just a bit of a possible "heads up" on this, but if your MUA has a
setting to automatically detect and use STARTTLS (and you use that
setting) then you're setting yourself up for a MITM attack vector where
the MITM can downgrade your connection to plain text and the MUA will
not let you know.
Years ago Thunderbird used to have a similar setting (Use Encryption if
available or something like that) but for years now they no longer offer
it, probably due to similar security concerns.
Peter
