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Smtp server outbound.att.net security certificate invalid

Wed, 03/14/2018 - 1:33pm - Anonymous
Site: 

Can't connect to AT&T SMTP server...keeps asking for username and passwords...show security certificate is invalid or expired

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Marie Cherry Ko... on

Can't get into myat&t.  Correct ID and password.  Leads to a blank page. Cannot pay bill using this site.

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