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!

Avatar for Username

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Learn More

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

Thunderbird doesn't trust a valid CA Certificate

  • 2 antwurd
  • 1 hat dit probleem
  • 38 werjeftes
  • Lêste antwurd fan christ1

ecksdee
ecksdee
more options

So basically I sent a digitally signed email using a certificate issued by Sectigo RSA Client Authentication and Secure Email CA.

Now the recipient of the email replied to me with a certificate issued by COMODO RSA Client Authentication and Secure Email CA, but it says the Digital Signature is invalid? Why is it invalid?

I got an error when I try to reply back with a digitally signed and encrypted email:

Sending of the message failed. You specified encryption for this message, but the application failed to find an encryption certificate for johndoe@gmail.com

What I have tried so far:

Exported the .crt then import it on "Manage Certificates" People's Tab

But still got an error when trying to reply to the email

So basically I sent a digitally signed email using a certificate issued by Sectigo RSA Client Authentication and Secure Email CA. Now the recipient of the email replied to me with a certificate issued by COMODO RSA Client Authentication and Secure Email CA, but it says the Digital Signature is invalid? Why is it invalid? I got an error when I try to reply back with a digitally signed and encrypted email: Sending of the message failed. You specified encryption for this message, but the application failed to find an encryption certificate for johndoe@gmail.com What I have tried so far: Exported the .crt then import it on "Manage Certificates" People's Tab But still got an error when trying to reply to the email

Alle antwurden (2)

ecksdee
ecksdee Fraacheigener
more options

Here's a screenshot, it doesn't trust COMODO CA

christ1
christ1
  • Top 25 Contributor
more options

Please stick to your original topic at https://support.mozilla.org/en-US/questions/1250241