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

error message: Sending of the message failed. Peer using unsupported version of security protocol. The configuration related to mail.vfast.co.uk must be corrected.

  • 1 reply
  • 1 has this problem
  • 4 views
  • Last reply by sfhowes

more options

How do I correct the problem given by error message above as suddenly won't receive or send emails - it seems to be associated with a thunderbird update

How do I correct the problem given by error message above as suddenly won't receive or send emails - it seems to be associated with a thunderbird update

All Replies (1)

more options