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Sending of password did not succeed. Server error - please try again later.

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I started getting this error "Sending of password for user xxxx@sbcglobal.net did not succeed. Mail server inbound.att.net responded: server error - please try again later." on 11/17/20, when TB updated to version 78.5.0. I'm aware that ATT requires a secure mail key, and tried to update to that, but still no luck. Both incoming & outgoing servers are set to normal password authentication. I'm using the correct ATT Pop server settings. Deleted saved passwords, restarted TB, tried to re-enter the SMK, but keeping getting the same error message. I can access my mail through att.net, so that's working, but really want to keep using TB. Any help would be greatly appreciated. OS is Windows 10 Pro.

I started getting this error "Sending of password for user xxxx@sbcglobal.net did not succeed. Mail server inbound.att.net responded: server error - please try again later." on 11/17/20, when TB updated to version 78.5.0. I'm aware that ATT requires a secure mail key, and tried to update to that, but still no luck. Both incoming & outgoing servers are set to normal password authentication. I'm using the correct ATT Pop server settings. Deleted saved passwords, restarted TB, tried to re-enter the SMK, but keeping getting the same error message. I can access my mail through att.net, so that's working, but really want to keep using TB. Any help would be greatly appreciated. OS is Windows 10 Pro.

All Replies (7)

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Are you using Avast/AVG or ESET? There are several posts today about ESET blocking TB, and Avast/AVG can do the same if the Mail Shield and secure connection scanning are enabled.

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If you are using ESET/NOD32 security/AV then probability is very high it is causing your problems. According to ESET forums, you should temporarily disable SSL on ESET until they solve the problem per https://support.eset.com/en/kb3126-disable-ssl-filtering-in-eset-windows-products?ref=esf - the problem is being reported by dozens of users https://forum.eset.com/topic/26517-problems-with-thunderbird-and-imaps/ https://forum.eset.com/discover/

You might also inform them of your difficulty.

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No, I'm using McAfee Small Business version 16.0.

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Disable the email scanning option and see if that makes a difference.

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Those instructions aren't quite what I see in the business version--it doesn't give me an option to disable real-time scanning for certain areas, like email. It looks like it's either all off or all on (though, you can exclude certain files). So, I tried turning it off and checking mail again. Same error.

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Suggest you contact ESET

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Hi Wayne, not using ESET. I have McAfee Small Business.