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

Thunderbird startup issue - re: Default Mail Client error

  • 1 reply
  • 0 have this problem
  • 31 views
  • Last reply by Matt

more options

For several months and updated versions, very time Thunderbird starts, I get an error message: Either there is no mail client or the current client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client. If I press OK or the X to close the window, I have to do this 18 times and then Thunderbird starts up normally. I am running windows 7 and do have Thunderbird set as the default for the programs it can open.

For several months and updated versions, very time Thunderbird starts, I get an error message: '''Either there is no mail client or the current client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client'''. If I press OK or the X to close the window, I have to do this 18 times and then Thunderbird starts up normally. I am running windows 7 and do have Thunderbird set as the default for the programs it can open.

All Replies (1)

more options

Please see the discussion in this bug report. Starting about comment 32 is the big that leads me to suggest you have an issue with an ldap address book. Or more than one.

https://bugzilla.mozilla.org/show_bug.cgi?id=1727230