0x800ccc13 error in Outlook 2013 and 2016

On Outlook 2013, my son's account was getting an error "0x800ccc13" when trying to send email. I repaired the outlook data file and still received the same message. I upgraded to outlook 2016 and still received the same message.

The send/receive test when creating/editing an account is successful.

What can I do?
Lev SeltzerAsked:
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TemodyPickalbatros, IT ManagerCommented:
did you try to change outgoing port try to use SSL with 465 or TLS with 587
Lev SeltzerAuthor Commented:
port was already set at 587, as per the recommendation of the mail host.
TemodyPickalbatros, IT ManagerCommented:
please verify that the SMTP in advanced settings like image below
SMTP.png

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Lev SeltzerAuthor Commented:
I am not finding a solution, so I am abandoning this (it is also difficult to debug when my son is not at his computer).
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