Thunderbird
how setup an att.net e-mail account in thunderbird
how setup an att.net e-mail account in thunderbird
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Use a "Secure Mail Key" instead of your normal ATT password. See https://www.att.com/support/article/email-support/KM1240308 and Automatic Account Configuration
More info available here https://www.att.com/support/topic/email-support/topic_troubleshootingi-topic_setupverifyemailclie
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