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Thunderbird 128.4.3esr (64-bit) won't connect with yahoo mail servers

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Thunderbird was working perfectly for Yahoo and another email (and the gmail inbox).

It is still working for for the second account and the gmail inbox!

The last yahoo message received via Thunderbird was at 22 November 2024 at 12.15 pm. I can see from the yahoo account online that I have received several more emails since then.

I tried to send a yahoo email today using Thunderbird;  result "Login to server smtp.mail.yahoo.com ...failed. I haven't changed anything. 

The Yahoo account server settings show: POP mail server pop.mail.yahoo.com port 995 SSL/TLS OAuth2

There's no SMPT server information displayed in settings.

Re the gmail inbox, when I set up thunderbird on my new computer in May and imported the email accounts, everything was present and correct except for the gmail account for which only the inbox and contents arrived.

There's no problem with any of the accounts when I log in online.

Can anyone help me with three questions please:

Is there a problem with Thunderbird 128.4.3esr?

If not how do I get it working again without having to do anything difficult or technical?

How can I recover the other folders from the third email account? I imported the account by copying the Thunderbird roaming profile in exactly the same way as for the other two accounts which arrived intact.

Thank you.

Thunderbird was working perfectly for Yahoo and another email (and the gmail inbox). It is still working for for the second account and the gmail inbox! The last yahoo message received via Thunderbird was at 22 November 2024 at 12.15 pm. I can see from the yahoo account online that I have received several more emails since then. I tried to send a yahoo email today using Thunderbird; result "Login to server smtp.mail.yahoo.com ...failed. I haven't changed anything. The Yahoo account server settings show: POP mail server pop.mail.yahoo.com port 995 SSL/TLS OAuth2 There's no SMPT server information displayed in settings. Re the gmail inbox, when I set up thunderbird on my new computer in May and imported the email accounts, everything was present and correct except for the gmail account for which only the inbox and contents arrived. There's no problem with any of the accounts when I log in online. Can anyone help me with three questions please: Is there a problem with Thunderbird 128.4.3esr? If not how do I get it working again without having to do anything difficult or technical? How can I recover the other folders from the third email account? I imported the account by copying the Thunderbird roaming profile in exactly the same way as for the other two accounts which arrived intact. Thank you.

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