The problem is,
1. Your web application’s domain name is www.foo.com
2. Your server IP is 184.108.40.206, and it sends emails to users from firstname.lastname@example.org
3. When a user email@example.com gets an email from it, GMAIL may consider it is spam because it doesn’t know whether 220.127.116.11 really represents firstname.lastname@example.org .
What you need to do is to setup a SPF DNS record for your domain, to tell people that 18.104.22.168 can send emails from email@example.com. On Godaddy, you can do this according to,