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.

Installing Thunderbird email, can't get past "Add Security Exception" error.

blainebillman
blainebillman
more options

When I install Thunderbird, either the Microsoft-approved version (129mb) or directly from thunderbird site (119mb), I get the attached error message. It doesn't matter if I click Cancel or click "Confirm Security Exception", I get the same result. The initial result is that I go into my new Thunderbird email account and all appears fine). But when I try to send an email, I get that same message again (altho with a different 3-digit number following imap.gmail.com) followed by a "message couldn't be sent" error message.

When I install Thunderbird, either the Microsoft-approved version (129mb) or directly from thunderbird site (119mb), I get the attached error message. It doesn't matter if I click Cancel or click "Confirm Security Exception", I get the same result. The initial result is that I go into my new Thunderbird email account and all appears fine). But when I try to send an email, I get that same message again (altho with a different 3-digit number following imap.gmail.com) followed by a "message couldn't be sent" error message.
Attached screenshots

All Replies (1)

Bogomil Shopov - Бого
Bogomil Shopov - Бого
more options

Hi, There is a discussion about this here: https://support.mozilla.org/en-US/questions/1144103. Maybe you will find some leads on how to solve it!