Mail program not sending or receiving

My Mail has stopped receiving & sending emails. (I can still access them online). The SMTP says it is offline. How do I fix this & why does it just suddenly happen?. It has happened twice before in the past year. Frustrating.

Hi,
Ports for Incoming and Outgoing should not be the same. Port 995 may be suitable for outgoing with SSL if the provider permits. For IMAP accounts Port 993 is the Incoming to match with SSL.
Port 110 is for Incoming POP3 use, but not Outgoing. You university internet service should be able to advise you better than they appear to have so far. Verizon should be able to tell you if their SMTP can be used where the ISP is not Verizon.
Ernie

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