v=spf1 ip4:211.121.22.56 a mx a:server.hostname.com ~all
My understanding is it allows the following to send out emails:
ip4: 211.121.22.56
a: A recor开发者_如何学Pythond (where website is hosted)
mx: whatever the MX record says
a: this server name
And nothing other than the above 4 places
Am I correct?
I don't know about the "a"s but yes, it validates to whoever checks it - that mail is allowed to be sent in this domain from either the IP address or the server.hostname.com.
Q. Should be on serverFault.
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