What Stefan meant to say is that Elog does not implement sending email using encrypted SMTP over TLS.

In theory it could be implemented, but if you try to use it, you may find that most
destinations will reject you unless you have configured correct SPF records.

https://en.wikipedia.org/wiki/Sender_Policy_Framework

Even if you do everything right, joints like gmail may still reject you because
their AI decides you are a spammer, or just because they do not like you, and good
luck making them change their mind.

At TRIUMF, we configure elog to use unencrypted and unauthenticated SMTP
to smtp.triumf.ca, which has special rules to accept our email (no questions asked),
and our Microsoft email instance is configured to accept and forward email from
smpt.triumf.ca. Everything is done right, but we still see Fermilab's Microsoft
rejecting TRIUMF's Microsoft email once in a while.

K.O.