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.

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

Cannot send messages

  • 25 tontu
  • 1 am na jafe-jafe bii
  • 1 view
  • i mujjee tontu mooy Ross476

more options

Cannot send messages (incoming, no problem) Had same problem a few days ago. Fixed by changing setting as instructed by Bitdefender. Problem now returned. Have followed trouble shooting sequence list in Thunderbird Help, including changing password.

Server information: 2 attachments Mail provider and ISP: BT (British Telecom). Firewall: Bitdefender Total Security. OS: Win 10 Version 10.0.18363 Thunderbird Version 68.7.0 (32-bit)

Mail and News Accounts ID Incoming server Outgoing servers Name Connection security Authentication method Name Connection security Authentication method Default? account2 (none) Local Folders None Normal password account21 (imap) mail.btinternet.com:993 SSL/TLS Normal password mail.btinternet.com:465 SSL/TLS Normal password true account23 (imap) mail.btinternet.com:993 SSL/TLS Normal password mail.btinternet.com:465 SSL/TLS Normal password true account24 (imap) mail.btinternet.com:993 SSL/TLS Normal password mail.btinternet.com:465 SSL/TLS Normal password true

Cannot send messages (incoming, no problem) Had same problem a few days ago. Fixed by changing setting as instructed by Bitdefender. Problem now returned. Have followed trouble shooting sequence list in Thunderbird Help, including changing password. Server information: 2 attachments Mail provider and ISP: BT (British Telecom). Firewall: Bitdefender Total Security. OS: Win 10 Version 10.0.18363 Thunderbird Version 68.7.0 (32-bit) Mail and News Accounts ID Incoming server Outgoing servers Name Connection security Authentication method Name Connection security Authentication method Default? account2 (none) Local Folders None Normal password account21 (imap) mail.btinternet.com:993 SSL/TLS Normal password mail.btinternet.com:465 SSL/TLS Normal password true account23 (imap) mail.btinternet.com:993 SSL/TLS Normal password mail.btinternet.com:465 SSL/TLS Normal password true account24 (imap) mail.btinternet.com:993 SSL/TLS Normal password mail.btinternet.com:465 SSL/TLS Normal password true
Nataali seetu yiñ ci takkaale

Ross476 moo ko soppali ci

Saafara biñ tànn

Issue taken up with BT. They agreed there was an IP problem. All now resolved and Thunderbird sending emails.

Jàng tontu lii ci fi mu bokk 👍 0

All Replies (5)

more options

Aleady checked. Unchecked and reclicked. No change. See attached.

more options

First attempt to send this morning resulted in the attached.

more options

re :Having same problems with TB on wife's computer........error failure for policy reasons

This sounds like BT is blocking the IP address. I've known it to occur if you were travelling, so using different isp access or if suspected spamming activity.

On wife's computer and on your computer are you able to logon to respective BT accounts using webmail via a browser ? Please do this on both computers and report back with results.

more options

I can logon to my 3 BT accounts using webmail via a browser using my computer. My wife can logon to her 3 BT accounts using webmail via a browser using her computer.

more options

Saafara yiñ Tànn

Issue taken up with BT. They agreed there was an IP problem. All now resolved and Thunderbird sending emails.

  1. 1
  2. 2