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IMAP certificate error

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IMAP certificate error

I recently had an issue with email not coming through on my desktop using MS Outlook 2007.  A tech had me change from POP3 to IMAP.  Now there is an issue on the machine because of the SSL certificate is causing an error.  The SSL certificate on Comcast servers is specific to the POP3 server (mail.comcast.net) and when the IMAP is configured to imap.comcast.net the certificate is failing and causing an error.  I am unable to find a solution online.