Send Guardian Usage Statistics · Download List of All Websites using Send Guardian
Anti-spam email filtering service.
SPF Usage Statistics · Download List of All Websites using SPF
The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.
Last technology detected on 18th May 2020. We know of 2 technologies on this page and 60 technologies removed from todoteletienda.es since 15th September 2013. Link to this page.
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