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I am using the spf record creator at and it's telling me we have 14 mx records. This is not right. We use google apps for our email and when I check our host records it is only showing the google mail servers. When I use the spf record generator it states the information below.

    This wizard found 14 names for the MX servers for
    `enter code here`,,,,,,,,,,,,, and 
    (A single machine may go by more than one hostname. All of them are shown.) 
    MX servers receive mail for 
    Do they also send mail from

Where are these other mx records coming from? Is there a way I can block them?

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up vote 8 down vote accepted

What is It’s Google. A WHOIS lookup for that domain reveals it’s owned by them.

Why would Google use an "weird" domain name like It’s symbolic of a googol (10×10^100) which is where Google gets its name from.

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This isn't a major problem.

That tool is first looking up your MX records. That's all those domains you see there. That tool is then also listing alternate DNS records for those IP addresses, determined via a reverse-DNS lookup. So you're also seeing the FQDN for each Google MX record for your domain. So those 7 records turn into 14. Nothing to worry about.

As Ceejayoz has shown, is just a different domain for Google's Content Delivery Network.

--Christopher Karel

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