KumoMTA

How it plugs in

Signal on Email Server Software5.1#24 of 33

Pricing

• CommunityFree software access · Community Discord supportOn request
• Silver sponsorshipAll prices are per billion messages per year · Business-hours support · Email and portal support · Shared semi-private support Discord$5,000/yr
• Gold sponsorshipAll prices are per billion messages per year · Extended business-hours support · 24/7 critical issue support SLA · Email and portal support · Private support Discord$10,000/yr
• Enterprise sponsorship24/7/365 support · 24/7 critical issue support SLA · Email, portal, and telephone supportOn request

As kumomta.com lists them, checked 4 Oct 2026.