Pull-Request to Issue #3

[MrUnknownDE]

The issue #3 be resolved by using msmtp as an alternative to the mail command. This approach does not require a local Mail Transfer Agent (MTA) and can send emails via an SMTP server.

Below is the modified code that uses msmtp:

(
  echo "To: $email"
  echo "Subject: $mailsubject"
  echo "Content-Type: text/plain"
  echo
  cat $mailtext
) | msmtp $email

Steps to Implement the Solution:

1. Install msmtp on your system. For Debian-based distributions, you can use:

   sudo apt-get install msmtp

2. Configure msmtp by creating or editing the configuration file ~/.msmtprc with the necessary SMTP server details:

   account default
   host smtp.yourserver.com
   port 587
   from youremail@yourdomain.com
   auth on
   user youremail@yourdomain.com
   password yourpassword
   tls on
   tls_trust_file /etc/ssl/certs/ca-certificates.crt
   

3. Ensure the configuration file has the correct permissions:

   chmod 600 ~/.msmtprc

4. Update the backup-tool.sh script with the provided code snippet.

5. Test the script to ensure emails are sent successfully without relying on a local MTA.

This solution ensures that the backup process can run smoothly in environments without an MTA, maintaining the reliabilityand effectiveness of your backup notifications.

[MrUnknownDE]

With the implementation of this code modules, I have optimized the script to enhance its functionality and efficiency.