Install send mail service on Fedora

Fedora: Install and Configure Authenticated Mail Sending with msmtp and s-nail

Overview

This guide explains how to set up authenticated email sending from the command line on Fedora using msmtp (a lightweight SMTP client) and s-nail (a mailx-compatible mail utility). This method is ideal for scripts and system notifications in environments where only authenticated SMTP is allowed.

1. Install Required Packages

sudo dnf install msmtp s-nail

2. Configure msmtp

1. Copy the example configuration (optional):

   sudo cp /usr/share/doc/msmtp/msmtprc-system.example /etc/msmtprc

2. Edit /etc/msmtprc and adjust to your SMTP provider:

   sudo nano /etc/msmtprc

   Example configuration:

   defaults
   auth           on
   tls            on
   tls_trust_file /etc/ssl/certs/ca-bundle.crt
   logfile        /var/log/msmtp.log
   
   account        default
   host           mail.hosting.de
   port           587
   from           admin@simmy.org
   user           admin@simmy.org
   password       <super-secret>

   
   
3. Set permissions to protect your password:

   sudo chmod 600 /etc/msmtprc 

3. Configure s-nail to Use msmtp

Add the following line to /etc/s-nail.rc or your ~/.mailrc:

set mta=/usr/bin/msmtp

4. Send a Test Email

echo "This is the body" | mail -s "Test Subject" recipient@example.com

• If the command returns no errors, the mail was sent successfully.
• Check /var/log/msmtp.log for troubleshooting if needed.

5. Notes

• If you receive an error like "Authenticated user is not permitted to override sender address", ensure the from address in /etc/msmtprc matches the authenticated SMTP user, or configure your SMTP provider to allow the desired sender address.
• For use in scripts (e.g., backup notifications), simply use the mail command as shown above.

References

• Sending e-mails via mailbox.org with msmtp on Fedora
• Fedora Docs: Mail Servers
• Fedora Forum: Sending mail with the (mailx) command