Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

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

Recent Nov., 2023 Update Caused Thunderbird to fail on sending/receiving email

  • 1 resposta
  • 0 have this problem
  • 35 views
  • Last reply by umeweall1

more options

I recently updated to the new version of Thunderbird. I now cannot send, or receive email. I get the following message.

Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.comcast.net failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.

How do I get my email working again?

I recently updated to the new version of Thunderbird. I now cannot send, or receive email. I get the following message. '''''Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.comcast.net failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.''' How do I get my email working again?

All Replies (1)

more options

OK, found the problem. Since Thunderbird had changed, Bitdefender had disallowed the newly installed software to function. I had searched the Bitdefender logs, to see if anything had happened, and I found the line denying Thunderbird internet access, due to the software change. I enabled Thunderbird to access the network, and all was well.