Problem reported:
I have configured my Account in IMAP with SSL on Port 993 in Thunderbird long time back
Not receiving new mails in Thunderbird
Observations:
- Mails have suddenly stopped working
- Not able to receive new mails in Thunderbird
- New mails are visible in webmail
- There is no error popup in Thunderbird
Solution:
Such a problem is observed in Thunderbird in case there is any change in the SSL Certificate
Please refer to the following options to address this issue
Option 1: For the latest version of Thunderbird ver. 78.10 and above
Remove the old certificate
- Goto Tools => Options
1. Select Privacy & Security
2. Click on Manage Certificates under Certificates section
3. Search for all certificates starting with the name COMODO
4. Select all certificates listed under COMODO
5. Click on Delete and Distrust
6. Click on OK
7. Close Thunderbird
8. Start Thunderbird again
9. New mails should start receiving
Option 2: For the older version of Thunderbird
- Goto Account Settings
- Disable SSL by changing IMAP port from 993 to 143
- Check if the mails are receiving
