Linux Tutorials - Herong's Tutorial Examples - v5.34, by Dr. Herong Yang
Thunderbird Configuratin for SMTPS Service
Provides a tutorial example on how to configure Thunderbird use SMTPS (SMTP with SSL/TLS) service to securely sending out new emails.
If you are concerned about sending emails as clear text to the remote SMTP service, you can change Thunderbird configuration to use SMTPS (SMTP with SSL/TLS) service provided by Postfix.
For example, my Postfix is configured to support the following:
So here is what I did to change Thunderbird configuration with above server setting.
1. On my email server, make sure that Postfix listening on the given port.
herong$ nmap -T4 192.168.1.100 PORT STATE SERVICE 465/tcp open smtps
2. On my email server, make sure that the firewall is open for those ports.
herong$ sudo firewall-cmd --zone=public --list-all public (active) services: cockpit dhcpv6-client ftp http imap pop3 pop3s smtp smtps ssh
3. Now launch Thunderbird on the other computer.
4. Click "Tools > Account Settings" menu. You see the "Account Settings" tab open.
5. Click "Outgoing Server (SMTP)" on the left. You see the "Outgoing Server (SMTP) Settings" open.
6. Click on the "192.168.1.100". You see the current SMTP server setting.
7. Make the following changes:
Settings Description: SMTP with SSL/TLS Server name: 192.168.1.100 Port: 465 Security and Authentication Connection security: SSL/TLS Authentication method: Normal password Username:
8. Click "OK" to save changes.
Test it by sending a new email. If you see a certificate exception, click "Confirm Security Exception" to accept it.
Congratulations! Your Thunderbird is securely sending and receiving emails now.
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