How to solve ThunderBird failed to find the settings problem?

I reinstall postfix. After that, I couldn’t access postfix mail account from ThunderBird. However, before reinstalling, I could access it, but all of a sudden I couldn’t send mail. That’s why I decided to reinstall postfix. As a result, i get this error in ThunderBird: Thunderbird failed to find the settings for your email account. How to solve it?

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April 9, 2024


1. Verify Postfix Configuration

  • Ensure that your Postfix server is correctly configured and running. Check the main configuration file (typically /etc/postfix/ for any discrepancies from your previous setup.
  • Make sure Postfix is listening on the correct interfaces and ports. For SMTP, it’s usually port 25, 465 (with SSL), or 587 (for submission).

2. Check Mail Logs

  • Review the mail logs to identify any errors or warnings. These logs can often provide insights into what’s going wrong. The mail logs are typically located at /var/log/mail.log or /var/log/mail.err.
sudo tail -f /var/log/mail.log
sudo tail -f /var/log/mail.err

3. Test SMTP Connectivity

  • Test SMTP connectivity to ensure that your Postfix server is reachable and responding. You can use telnet or openssl to connect to your SMTP server:
openssl s_client -connect 

4. DNS and MX Records

  • Ensure that the DNS settings for your domain are correctly configured. This includes MX records pointing to your mail server.

  • Use online tools or the dig command to verify your domain’s MX records:

dig mx

5. Configure Thunderbird Manually

  • If Thunderbird can’t automatically find the settings, try setting up the account manually:
    • In Thunderbird, go to account settings and add a new email account.
    • Choose to configure the account manually.
    • Enter the incoming (IMAP or POP3) and outgoing (SMTP) server details as per your Postfix configuration.

6. Check Firewall and Network Settings

  • If you have a firewall enabled on your Postfix server, ensure that it allows incoming connections on the relevant SMTP, IMAP, or POP3 ports.
  • If your server is behind a NAT or router, ensure the ports are forwarded correctly.

Additionally, what settings were you previously using?

For now, I can access my mail account manually in ThunderBird. However, I cannot send or receive mail from another user. How to fix it?

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