Issues sending email form VestaCP on Digital Ocean VPS

I currently have a personal web design & hosting business going on and I’m using digital ocean as the vps with VestaCP as my control panel. By Default VestaCp comes with Roundcube as the email client. I had deployed the server with no issue at all and my droplet and configuration is able to serve websites with no issue. The only problem I’m having is that when I try to use roundcube to send emails it continues to fail. I am able to receive emails but when I attempt to send a email i get back an email that states “The message can not be delivered” and that “its being blocked by the email server” of yahoo, gmail, & etc. Can anyone help me with this issue?

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If you are currently going to use your droplet for running a mail server for sending and receiving mail, you will need to configure your MTA to listen publically on port 25 and your MX records will point to your droplet’s hostname.

If you would like to only use your droplet for sending mail, you may want to check out the following tutorial:

Please let us know if there is anything else we can help you with.

Best, Mike DigitalOcean Support Check out our community for great tutorials, articles and FAQs!