How do i setup the right dns entries

[awahqn]

Hi,

I dont know if this is the right place to ask but I hope I find and answer to my question. I have two vps servers. One with the main domain name (example.com) and the other is serving mail.example.com. The example.com is serving the web server while the mail.example.com is serving the mail server and the mail client (roundcube). Now what I need help with is setting up the right DNS records to forward all the emails coming to example.com to mail.example.com droplet. So like the mail server is kinda working now and it can send emails. these are the current dns reccords of my example.com:

$TTL    1800
@       IN  SOA NS1.DIGITALOCEAN.COM.   hostmaster.goodwindows.org. (
            1402913331 ; last update: 2014-06-16 10:08:51 UTC
            3600 ; refresh
            900 ; retry
            1209600 ; expire
            1800 ; ttl
            )
             IN      NS      NS1.DIGITALOCEAN.COM.
                     NS      NS2.DIGITALOCEAN.COM.
                     NS      NS3.DIGITALOCEAN.COM.
            MX 0    mail.goodwindows.org.
            MX 10   @
@   IN A    107.170.142.45
www CNAME   @
mail    IN A    107.170.232.141
*   CNAME   @

and this is the dns records for mail.example.com

$TTL    1800
@       IN  SOA NS1.DIGITALOCEAN.COM.   hostmaster.mail.goodwindows.org. (
            1402885887 ; last update: 2014-06-16 02:31:27 UTC
            3600 ; refresh
            900 ; retry
            1209600 ; expire
            1800 ; ttl
            )
             IN      NS      NS1.DIGITALOCEAN.COM.
                     NS      NS2.DIGITALOCEAN.COM.
                     NS      NS3.DIGITALOCEAN.COM.
@   IN A    107.170.232.141

So what should I do? any help will be more than appreciated!