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What is the +all mechanism in SPF and should I use it?
What is the +all mechanism in SPF and should I use it?

Information on the +all mechanism in SPF, what it means and why it should not be used in your SPF records.

Ivan Kovachev avatar
Written by Ivan Kovachev
Updated over a week ago

The +all mechanism matches any IP address sending on your behalf and therefore should not be used. There would be no reason to have an SPF record if the +all mechanism is to be used. The domain owner risks being blocked as any source could send on their behalf, therefore negatively affecting their reputation.

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