Error : Relaying denied. IP name lookup failed [IP-Address]

Here I am trying to send mail using Java Mail API. When I am trying to test this to send mail to users from my office public IP address, it works but when I deploy my application to main server then it fails to send the mail, simply getting error message “Relaying denied. IP name lookup failed [IP-Address]”

Here all articles says you have to allow relay from certain hosts is to add those hosts to /etc/mail/local-host-names

You just need to make those changes to the mailserver that is running on your droplet.

Can you guys help me , where I have to configure this ??

Submit an answer

This textbox defaults to using Markdown to format your answer.

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

Sign In or Sign Up to Answer

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.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

Could you provide some more details about your set up? What kind of SMTP server are you trying to relay through? Is it something you control or an ISP’s? <br> <br>From your droplet, can you run: <br> <br>telnet the.smtp.server.domain 25 <br>