How to set up email to work properly in VestaCP?

I have VestaCP installed on Ubuntu 14.04 x64 and have created multiple email adresses in VestaCP. I was trying to use roundcube mail client for the emails, but I face a problem when sending emails out.

Most of the servers would reject the emails and provide different error messages. Following is a mesagge from gmail:

I have not yet sent a single email succesfully, so previous spam is not a problem.

P.S. Receiving emails works as a charm.

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To Fix this issue:

  1. Make sure your droplet name matches your server name. a. Power Off droplet. b. Click on Server Name, change this to aka: c. Go to Networking in Digital Ocean CP. Click on PTR Records. d. Add PTR record for aka: e. Power On droplet.

  2. Update Settings in VestCP to match. a. In VestaCP, click on Server Tab. (Make sure it has a FQ domain) aka: b. Under DNS, add an A record for that subdomain.

For all the settings and update to take place, it will take a while for other servers on the net to respond. But once this is done, you will be able to send/receive to pretty much any domain.

Vestacp is a trainwreck… no doubt …

If I could find a way to make vestacp work with mailinabox that would be great…