Google disabled the free google apps for business. please read google apps for business not free anymore for the detail.

We are rushing for some projects recently and it has a long time we did not create a post.

We built the mail server successfully using dovecot and exim4, it is not quite difficult to setup under Ubuntu.

However, all custom build mail server has to face an issue, spam mail.

we have tried to add spf, add header like “Reply to”, but no help.

we find that if your domain is not quite popular, you can try to add your domain to emailreg.org by paying USD 20 to prevent your email from adding to black list.

so what will you do? still build your own mail server and pay for such service? or use the free email account?

we finally make an decision, our email account will migrate to gmail.com which they could provide 10 free mail accounts for you.

the 1st step to do is to change your MX server to google server first:
ASPMX.L.GOOGLE.COM (MX Priority 1)
ALT1.ASPMX.L.GOOGLE.COM (MX Priority 5)
ALT2.ASPMX.L.GOOGLE.COM (MX Priority 5)
ASPMX2.GOOGLEMAIL.COM (MX Priority 10)
ASPMX3.GOOGLEMAIL.COM (MX Priority 10)
After that, you can go to this url http://www.google.com/intl/en/enterprise/apps/business/pricing.html and register

finally, verify your domain ownership after login to control panel http://google.com/a/YOUR DOMAIN, following the instruction after login and you can start using your mailbox with gmail.