On Fri, 16 Nov 2018, Paul Richard Thomas wrote:

> The curious thing is that it was an Outlook message whereas the
> receiving email handler is gmail. I would guess, therefore, that the
> problem is occurring at the Fermilab end.

'guessing' about causes of failures in the face of a 
straightforward explanation, testible by speaking to your 
email provider, rather than positing a testible hypothesis 
(as I did) seems useless

-- Russ herrold