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

no emails are downloading since certificate errors

  • 1 reply
  • 1 has this problem
  • 104 views
  • Last reply by calan1959b

more options

Hi - I have had gmail and my internet provider email accounts on Thunderbird working for years. Suddenly, a few days ago, I started getting certificate issues from Thunderbird warning me of the security risks. I chose to override. Now I am unable to download (imap) from either email server. I no longer receive the certificate risk dialog box. When I click on File>Get New Messages, message appear at the bottom of the page indicating Thunderbird is "connecting to the imap server" or "checking mail server capabilities", but nothing downloads. What do I need to do to correct this? Access to both servers stopped at the same time so I don't believe anything changed on the server end.

Thanks, Alan

Hi - I have had gmail and my internet provider email accounts on Thunderbird working for years. Suddenly, a few days ago, I started getting certificate issues from Thunderbird warning me of the security risks. I chose to override. Now I am unable to download (imap) from either email server. I no longer receive the certificate risk dialog box. When I click on File>Get New Messages, message appear at the bottom of the page indicating Thunderbird is "connecting to the imap server" or "checking mail server capabilities", but nothing downloads. What do I need to do to correct this? Access to both servers stopped at the same time so I don't believe anything changed on the server end. Thanks, Alan

Chosen solution

I discovered the problem - a recent Norton update

I changed the gmail SMTP port to 587 and tried to send an email. The certificate conflict message was displayed. This time I clicked on the View button and it produced a report that indicated the certificate Issuer name was generated by Norton Antivirus for SSL/TLS scanning. Didn't make sense. So I opened Norton Antivirus and disabled Email scanning and all the emails dropped. Unbelievable!!

Read this answer in context 👍 0

All Replies (1)

more options

Chosen Solution

I discovered the problem - a recent Norton update

I changed the gmail SMTP port to 587 and tried to send an email. The certificate conflict message was displayed. This time I clicked on the View button and it produced a report that indicated the certificate Issuer name was generated by Norton Antivirus for SSL/TLS scanning. Didn't make sense. So I opened Norton Antivirus and disabled Email scanning and all the emails dropped. Unbelievable!!