Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
Solved

Cannot send email. Mailbox unavailable

Thunderbird for Android Send and receive email
jcoles0727 replied
jcoles0727
jcoles0727

I have v.13 of Thunderbord for Android Outgoing server settings match those recommended by Rogers/Yahoo, except that there is no Password field. App says SMTP server settings are valid, but when I try to send I get "Mailbox unavailable" error.

I have v.13 of Thunderbord for Android Outgoing server settings match those recommended by Rogers/Yahoo, except that there is no Password field. App says SMTP server settings are valid, but when I try to send I get "Mailbox unavailable" error.

All Replies (2)

Platform34
Platform34
  • Top 25 Contributor

Chosen Solution

Is this a new account you've added to TB-A or errors that just started occuring on a previously working configuration?

The lack of a password field would be normal for oAuth 2.0 authentication. Plain user name and password authentication is no longer supported by Yahoo.

Try logging into your webmail, send yourself an email to confirm the account is functioning normally. It might be a temporary service issue or a full mailbox.

jcoles0727
jcoles0727 Question owner

I'm not sure whether I ever tried sending email from the Android phone before. But after some difficulties with TB 148 (now resolved) I thought I should test it. On further investigation, I found a spelling mistake in my username in the SMTP settings. All is OK now.

Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.