My boss asked me to set up Google Apps for a client and basically I have done everything including setting up MX records in DirectAdmin and re-creating the email accounts in Google Apps.

I also sent a few test emails to ensure that it actually works and it seems fine.

But then I discovered this article talking about changing the SPF record for the domain.

http://www.google.com/support/a/bin/answer.py?answer=178723

After reading the introduction I think it would be better for me to change the SPF record according to this article.

So I logged in to the DirectAdmin and navigated to the DNS management, and then I found that there's already a TXT SPF record there:

v=spf1 a mx a:spf.cabin.com.hk include:gmail.com -all

And it looks like it's already including gmail.com, but according to the article it should be:

_spf.google.com

rather than:

gmail.com

I dare not to change it before I understand what this record actually means.

What would you do with this record if you were me?