Question

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 ??


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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>