Email Hosting Providers

ZendeskZendesk

Zendesk Usage Statistics · Download List of All Websites using Zendesk

Organize, prioritize and engage with others on support requests.

CRM · Ticketing System

SPFSPF

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.

Standard