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Here's the issue in a nutshell. At least one of the smtp.att.yahoo.com servers has incorrectly installed SSL certificates. This means when an attempt is made to verify the connection (since it is supposed to be a secure connection) the certificate check fails.
The problem is sporadic, which probably means that there is more than one smtp server behind smtp.att.yahoo.com, and at least one of them is set up correctly and the certificate checks pass.
Bottom line: ATT has to fix their server(s) to send valid certificate information.
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was this problem resolved? Often mail (it appears mostly to gmail and Yahoo) from my attglobal accoutn via thunderbird just do not get delivered
An old idm.net user, have had years of good service from attglobal.net - but since 5 Sept 13 have lost my 30-odd daily inbox emails.
Worse, there seems to be no way to phone or email supervisors, managers or directors about the continuing silence.
I need those 600-odd emails. Any idea or hint of help would be very welcome.
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