On 24/01/2019 08:07, Andy Burns wrote:
Biggles wrote:

Internet mail between servers uses SMTP which isn't encrypted.

With a large number of users coalescing around gmail.com,
office365/outlook.com/hotmail.com etc, they do use SMTP between servers
when the sender and receiver both support it

Search for TLS or SMTPSÂ*Â*Â* in headers, you may be surprised, but it
isn't universal.

I stand corrected!

As you say though, not universal, so can't rely on encryption (yet).
--
Biggles