Thanks for all the replies to my original message. It
confirmed to me that the problem is sourced here. Just for everyone's
information, I am a retired senior systems analyst with 40 years of experience
in every aspect of computers and computing.
Briefly, your replies confirmed to me that it is my
e-mail client program that is not handling Yahoo's security certificate
properly. BTW -- Yahoo is the only Internet server I've ever received this
warning from. This has nothing whatsoever to do with a virus or malware. The
messages go right through my anti-virus program, as they should. The
warning states that the security certificate is valid, but was issued by a
different entity than that for which the certificate covers. Symantic
is the issuer, on behalf of Yahoo. Apparently Yahoo farmed the certificate
handling out to a third party - Symantic - and that's the cause of the
warning.
Most everyone these days sends and retrieves their
e-mail as "Webmail" through their Internet browser. I do not. E-mail is
transmitted and received on my system in a completely different form than
Webmail -- it is SMTP/POP messages and requires a client program (not a
browser) to handle messages. My client program is rather old, and apparently is
not designed to handle third-party security certificates
issuances.
Thanks to everyone who replied.
Mike
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