For statistical credibility, here’s the growth change versus January 2024, which still shows we are the leader in custom domains when compared to current recommended email services:
| Provider | Domain Names (2024 via SecurityTrails) |
Domain Names (2025 via ViewDNS) |
Percentage Change | MX Record |
|---|---|---|---|---|
| Forward Email | 418,477 |
506,653 |
+21.1% |
mx1.forwardemail.net |
| Proton Mail | 253,977 |
334,909 |
+31.9% |
mail.protonmail.ch |
| Fastmail | 168,433 |
192,075 |
+14% |
in1-smtp.messagingengine.com |
| Mailbox | 38,659 |
43,337 |
+12.1% |
mxext1.mailbox.org |
| Tuta | 18,781 |
21,720 |
+15.6% |
mail.tutanota.de |
| Skiff (defunct) | 7,504 |
3,361 |
-55.2% |
inbound-smtp.skiff.com |