Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Pomoc přepytać

Hladajće so wobšudstwa pomocy. Njenamołwimy was ženje, telefonowe čisło zawołać, SMS pósłać abo wosobinske informacije přeradźić. Prošu zdźělće podhladnu aktiwitu z pomocu nastajenja „Znjewužiwanje zdźělić“.

Dalše informacije
Archiwowany

Trying to open my emails

cor-el wotmołwjeny
Dianne

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]

Wot Andrew změnjeny

Wšě wotmołwy (1)

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