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

Trying to open my emails

  • 1 reply
  • 1 has this problem
  • 11 views
  • Last reply by cor-el

more options

My name is Dianne Andreotta. I got this message when I tried opening my e-mail: Firefox does not trust Xfinityconnect.email.comcast.net because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates. Below that is the error code: SEC_ERROR-UNKNOWN-ISSUER. Can you please help me fix this so I can get into my e-mails? Thank you in advance. My e-mail is: [email]

My name is Dianne Andreotta. I got this message when I tried opening my e-mail: Firefox does not trust Xfinityconnect.email.comcast.net because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates. Below that is the error code: SEC_ERROR-UNKNOWN-ISSUER. Can you please help me fix this so I can get into my e-mails? Thank you in advance. My e-mail is: [email]

Modified by Andrew

All Replies (1)

more options

Who is the issuer of the certificate ?

You can check details about the issuer of the certificate and the certificate chain.

  • click the "Advanced" button on the error page to show more detail
  • click the blue "View Certificate" text to inspect the certificate chain in a new tab in the Certificate Viewer