Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

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 closed and archived. Please ask a new question if you need help.

Thunderbird Signing Certificate Problem

  • 1 reply
  • 1 has this problem
  • 12 views
  • Last reply by Matt

more options

When I upgraded to Thunderbird version 91, I can no longer receive encrypted e-mails. The error message says that the e-mail does not contain a digital signature. However, when I view the e-mail using Outlook it clearly does have a valid digital signature. I tried sending a signed and encrypted e-mail to myself and others, and everyone else received it but I cannot read it because it says it does not have a digital signature. It worked fine before this recent upgrade.

When I upgraded to Thunderbird version 91, I can no longer receive encrypted e-mails. The error message says that the e-mail does not contain a digital signature. However, when I view the e-mail using Outlook it clearly does have a valid digital signature. I tried sending a signed and encrypted e-mail to myself and others, and everyone else received it but I cannot read it because it says it does not have a digital signature. It worked fine before this recent upgrade.

All Replies (2)

more options

Encrypted how? are you using the PGP implementation or s.mime the more mainstream of the two, but apparently the poor sheep these days.

more options

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.