This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

This thread was archived. Please ask a new question if you need help.

unable to log in at server. probably wrong configureation, user or password.

  • 6 replies
  • 1 has this problem
  • 1 view
  • Last reply by derek61

derek61
derek61
more options

Hi All ..I have a sky email here in UK which uses Yahoo email, I have tried to set up email account. I have put my details in and Thunderbird has picked up the old sky details (tools) >which I have changed as per yahoo's instructions to imap.mail.yahoo.com and smtp.mail.yahoo.com I have then done test which comes back as OK. tap on done and it checks the set up but then comes back with wrong config,user name or password. these are both correct. Help its driving me up the wall as all seems correct.

Hi All ..I have a sky email here in UK which uses Yahoo email, I have tried to set up email account. I have put my details in and Thunderbird has picked up the old sky details (tools) >which I have changed as per yahoo's instructions to imap.mail.yahoo.com and smtp.mail.yahoo.com I have then done test which comes back as OK. tap on done and it checks the set up but then comes back with wrong config,user name or password. these are both correct. Help its driving me up the wall as all seems correct.
Attached screenshots

Chosen solution

Hi I have been on to McAfee and they have said it is not McAfee stopping emails getting sent. He even tried turning McAfee off and no difference.

Read this answer in context 👍 0

All Replies (6)

sfhowes
sfhowes
  • Top 10 Contributor
more options

I think you need to click Advanced config. in the setup window and set the authentication to OAuth2:

https://support.mozilla.org/en-US/questions/1278588

https://support.mozilla.org/en-US/questions/1281225

derek61
derek61 Question owner
more options

Thanks for that It took me to a link to allow thunderbird to access Yahoo account. I have received my emails but have tried to send a test email it has not been sent and this error message came up see screen shot. thanks

Modified by derek61

sfhowes
sfhowes
  • Top 10 Contributor
more options

Make sure the smtp authentication is OAuth2, and disable any mail scanning option by your antivirus, usually by adding the TB profile folder as an exclusion or exception, disabling Mail Shield or the equivalent. Disable a VPN if you have one.

derek61
derek61 Question owner
more options

Chosen Solution

Hi I have been on to McAfee and they have said it is not McAfee stopping emails getting sent. He even tried turning McAfee off and no difference.

sfhowes
sfhowes
  • Top 10 Contributor
more options

Test if McAfee is an issue by running Windows in safe mode with networking, to bypass startup apps.

https://support.microsoft.com/en-ca/help/12376/windows-10-start-your-pc-in-safe-mode

McAfee is a perennial cause of problems with TB.

https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues#McAfee

derek61
derek61 Question owner
more options

It was the outbound port number was wrong not default I have sent and received a few test mails now and it looks like were good now Thanks for your time .