fortimail.com vs kasserver.com

kasserver.com is used by more websites in our catalog: 127 use fortimail.com and 736 use kasserver.com.

fortimail.com sites have the higher median Ahrefs Domain Rating (fortimail.com: 50, kasserver.com: 29).

Between 2026-06 and 2026-07, fortimail.com went from 0.02% to 0.01% of all tracked sites, while kasserver.com went from 0.10% to 0.08%. fortimail.com is gaining ground faster in our index.

No. A site runs a single email host, so fortimail.com and kasserver.com are mutually exclusive.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.