Edit ''/etc/ispcp/bind/parts/db_e.tpl'' and change the following things:

1. Minimum TTL (standard 3H) to 1H

2. MX records

Remove the line:
<code>IN MX 10 mail.{DMN_NAME}.</code>

and add following:
<code>IN MX 1 ASPMX.L.GOOGLE.COM.
IN MX 5 ALT1.ASPMX.L.GOOGLE.COM.
IN MX 5 ALT2.ASPMX.L.GOOGLE.COM.
IN MX 10 ASPMX2.GOOGLEMAIL.COM.
IN MX 10 ASPMX3.GOOGLEMAIL.COM.</code>


3. CNAME

3.1 Remove all CNAME that points to mail, imap, pop, pop3, smtp, relay & webmail.
(You can change webmail to: ghs.google.com instead of www.)

3.2 And add a CNAME for all different services you want to host.
All services should point to ghs.google.com, and the verification code to google.com!

<code>calendar            IN              CNAME           ghs.google.com.
start            IN              CNAME           ghs.google.com.
{verificationcode}            IN              CNAME           ghs.google.com.</code>

**Don't forget the ending dot after ".com".**

The verification code looks similar to "googlefffggghhh34435665" and you can find this in your controlpanel at Google Apps.