POP3 Email "Confirm the Certificate" Issue

Hello all,
My client has a domain and email through Network Solutions.  They are using Outlook 2013 and POP3 accounts and we are not using SSL.  No problems there.
Well one of the owners of the business has someone else setup his email at his house.  I am assuming that the technician setup the Outlook to use SSL since every time they get on it asks to Confirm the Certificate.  I was emailed by the wife of the owner that the technician stated that I needed to fix this with Network Solutions.  Huh?
The only way I know to fix this is on the PC side which is to either not use SSL or to if they have to use SSL then there should be a selection within the box that comes up to Show Certificate then to Trust Always.  
Am I wrong and is there something I need to do with Network Solutions?
Thanks,
Kelly W.
LVL 6
K_WilkeAsked:
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Dave BaldwinFixer of ProblemsCommented:
This page https://forum.web.com/networksolutions/faq/#Mail/Mail/MoreAboutPopAndImap/POP-or-IMAP-settings.htm?Highlight=pop%20imap%20settings  says...
Note - Make sure you are not choosing an SSL type. This option should be turned off, or "None" should be selected.
This page https://forum.web.com/networksolutions/faq/#Mail/Mail/UsingPopImap/step-by-step-pop-setup-instructions.htm  has instructions for many email clients.  All of them say to turn SSL off.
K_WilkeAuthor Commented:
So I was correct that they shouldn't be using SSL, right?
Thanks,
Kelly W.
Dave BaldwinFixer of ProblemsCommented:
I can't find anything in the Network Solutions email setup instructions that supports using SSL/TLS and my accounts on accounts on Network Solutions are not using SSL/TLS either.

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K_WilkeAuthor Commented:
Thank you very much.
Exactly what I wanted to see.
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