Checking if a domain’s mail server is actually Gmail using Powershell

Firstly, run powershell as Administrator and execute
[powershell]Import-Module DnsClient[/powershell]

After that you can run the Resolve-DnsName cmdlet:

Which returns:

You can specify which type of record you’re interested in:
Resolve-DnsName -type MX


So, take that logic and add a sprinkle of basic string functions to get:
(-join (Resolve-DnsName -Type MX –Name -ea 0).NameExchange).ToLowerInvariant().Contains("google")

Which returns True/False if any of the MX records contain “google”, which would mean the mail server is Gmail.

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