On 22 Dec 2020, at 07:19, James B. Byrne <byrn...@harte-lyne.ca> wrote:
> it appears to me that
> connecting to port 25 with STARTTLS is the accepted practice.

The recommendation for years has been to use port 587 (submission) for STARTTLS 
and to never use port 25 for anything but server-to-server communication.

-- 
When the stars threw down their spears And watered heaven with their
        tears, Did He smile his work to see? Did He who made the Lamb
        make thee?

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