On 2020-06-11 at  8:24 AM, Jack S. LaRosa <jlar...@charter.net> wrote:
> I noticed that some of the messages from one particular addressee have
> "RE:[EXT](original subject)" in the subject line. Anyone know why? All my 
> other
> messages from others simply have a subject without the RE:[EXT].

I assume this stands for "external". Some MTAs/mail servers are configured
to add these subject prefixes to messages that are sent from outside the
domain/company. My company adds "[EXTERNAL]" on my work mail.

-- 
Christopher Warrington <li...@mygcw.net>

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