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SPF

SPF

The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.

Web Servers

nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.

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Last technology detected on Wednesday, October 1, 2025. We know of 5 live technologies on rhel-linux.guru and historical technologies potentially back to 1985. Link to this Page

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