Question re using Postfix as a send-only SMTP server

My small server runs behind my firewall and my external IP is dynamic. I don’t understand the prerequisite to have a DNS hosting. I only want to be able to occasionally send a message using a pre-built “mail” command line. Currently using Debian 8.


Submit an answer
You can type!ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.


Indeed I believe that the DNS prerequisite is not mandatory in case that you are going to be using this only for outgoing emails.

Just make sure to add your droplet’s IP address to your allowed IPs in your SPF record in case that you have one.

Hope that this helps! Regards, Bobby