Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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.

I am getting failure to send errors and failure to save as a draft failures and the sending is very slow all this after a Windows 10 upgrade.

  • 1 reply
  • 1 has this problem
  • 6 views
  • Last reply by Wayne Mery

1Shepard
1Shepard
more options

I recently up graded to Windows 10. The sending of emails has slowed down significantly. One sentence emails take a long time and they often give me failure notices. Sometimes the recipient gets them and sometimes they do not. When I get a fail to send error message then when I attempt to save that email to drafts it will not save it to the draft folder and it get another error message.

Please let me know how to resolve this problem.

I recently up graded to Windows 10. The sending of emails has slowed down significantly. One sentence emails take a long time and they often give me failure notices. Sometimes the recipient gets them and sometimes they do not. When I get a fail to send error message then when I attempt to save that email to drafts it will not save it to the draft folder and it get another error message. Please let me know how to resolve this problem.

All Replies (1)

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor
more options

Please start *Windows'* safe mode with networking enabled - win10 https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode - win8 https://support.microsoft.com/en-us/help/17076/windows-8-startup-settings-safe-mode - win7 https://support.microsoft.com/en-us/help/17419/windows-7-advanced-startup-options-safe-mode#start-computer-safe-mode=windows-7 - XP https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/boot_failsafe.mspx

Still In Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird

Does problem go away? Please reply to let us know results.