We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

Server Configuration Issue

  • 1 nzaghachinzaghachi
  • 0
  • Nzaghachi ikpeazụ nke Matt

KMC
KMC
more options

Cannot send emails in Thunderbird application, instead getting error messages. After asking about creating a security exception, which we don't want, the following error message appears:

Sending of the message failed. Peer's Certificate issuer is not recognised. The configuration related to [server name] must be corrected.

No indication on how this can be corrected. Don't understand why it has suddenly become a error, when Thunderbird was previously working fine.

Please help!

Cannot send emails in Thunderbird application, instead getting error messages. After asking about creating a security exception, which we don't want, the following error message appears: Sending of the message failed. Peer's Certificate issuer is not recognised. The configuration related to [server name] must be corrected. No indication on how this can be corrected. Don't understand why it has suddenly become a error, when Thunderbird was previously working fine. Please help!

All Replies (1)

Matt
Matt
  • Moderator
  • Top 10 Contributor
more options

The usual cause is an antivirus products substituting self signed certificates so it can scan encrypted connections. Personally I just moved to defender as it does not do this.

Helpful?

Jụọ ajụjụ

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.