I am using nodemailer to send mails in nodejs. I am embedding hyperlink to mailbody it is working fine.

My sample mailbody is below

 `This is confirmation mail.\n
                       please click below link to login
              http://${req.headers.host}/login\n\n
              \n`

Observe the scenario, If i open my page as localhost:port it is sending mail with localhost:port when I open with Ipaddress:port then it is sending with Ipaddress:port.

Here comes the my problem I got mail successfully,now I opened my mail in another system and from there I click on the link then it is getting the server can't be reached. This is quite straight forward as the server is running on another machine but I am trying to open in different machine with locahost.

So how can i send the server ip address in that mail. I have also seen about server.address().address but how to use I got confused.