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ATT email problems usually arise when AT&T communications server is out of action. So, instead of making changes to your SBC Global email account settings, you should check whether the AT&T website is down. Also, check whether you are using your ATT email account on a stable internet connection. Secondly, though it's rare, the ATT email login problem can also be caused by connectivity or browser issues. If necessary, you should also update your AT&T email server settings for both your incoming and outgoing mail server since improper configuration of AT&T email server settings can also result in a lot of email problems.
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