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Unable to send any email, Thunderbird on Windows 11

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  • Last reply by sfhowes

bill.marshall
bill.marshall
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I'm unable to send any email with Thunderbird on my new Windows 11 laptop. I've used Thunderbird for years and years on the old Windows 10 one, but it won't send anything with the new one. The version info it gives is "128.5.1esr (64-bit)". Whenever I try to send an email message, it waits a long long time and then gives a popup saying "Login to server smtp.mail.yahoo.com with username [email removed]@verizon.net failed." It gives me an option to enter a new password, and if I click there it doesn't let me enter the password again, just re-tries, again waits a long long time, then gives the same error popup. When I cancel, it gives a new popup saying to check the password and verify the 'Authentication method' in Account Settings. Authentication method looks fine, but the password (Settings->Saved Passwords) is empty (?? But I entered the password when I started Thunderbird and asked it to save it).

I'm unable to send any email with Thunderbird on my new Windows 11 laptop. I've used Thunderbird for years and years on the old Windows 10 one, but it won't send anything with the new one. The version info it gives is "128.5.1esr (64-bit)". Whenever I try to send an email message, it waits a long long time and then gives a popup saying "Login to server smtp.mail.yahoo.com with username [email removed]@verizon.net failed." It gives me an option to enter a new password, and if I click there it doesn't let me enter the password again, just re-tries, again waits a long long time, then gives the same error popup. When I cancel, it gives a new popup saying to check the password and verify the 'Authentication method' in Account Settings. Authentication method looks fine, but the password (Settings->Saved Passwords) is empty (?? But I entered the password when I started Thunderbird and asked it to save it).

Modified by NoahSUMO

Chosen solution

Update 12/11: problem fixed. Trouble was the Outgoing Server (SMTP) in the account settings. Changed from "Verizon Online smtp.mail.yahoo.com (Default)" to "Use Default Server" and now it is OK. I think the default server is smtp.mail.yahoo.com (???). I'm still not sure the two different settings are different, but they must be because now it is OK.

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bill.marshall
bill.marshall Question owner
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Chosen Solution

Update 12/11: problem fixed. Trouble was the Outgoing Server (SMTP) in the account settings. Changed from "Verizon Online smtp.mail.yahoo.com (Default)" to "Use Default Server" and now it is OK. I think the default server is smtp.mail.yahoo.com (???). I'm still not sure the two different settings are different, but they must be because now it is OK.

sfhowes
sfhowes
  • Top 10 Contributor
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The authentication method for smtp.mail.yahoo.com should be OAuth2, not 'normal password', which displays the kind of prompt with 'enter a new password'.