HacksLinux SysAdmin Notes
Sending mass emails for testing purposes using Bash Script from the Linux Command Line.
Many ISPs block sending email over port 25. This means that you won’t be able to send mail directly from your Linux server.
A good way to get around this limitation is to set up a relay through a Gmail account.
The SMTP (Simple Mail Transfer Protocol) is an Internet standard for electronic mail (Email) transmission across Internet Protocol (IP) networks.
This tutorial shows how to connect to SMTP mail server and send an Email using the 'telnet' command.
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