Sites using Premium SMTP
Outbound mail relay and spam filtering service.
Found via: Product Hunt 2 · Hacker News 1 · PeerPush 1 · StackScope Discovery (Indie) 2 · StackScope Wider Web 5
Premium SMTP has been detected on 4 launches since first appearing in April 2026. Most recent detection: Nexis, on June 19, 2026.
It's most commonly paired with WordPress, HTTP/3, and Google Search Console.
Share of new launches using Premium SMTP
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
How StackScope detects technologies
⋮ Jul 3, 2026: Email provider detection improved: providers identified from mail configuration are now caught on a site's first crawl. Earlier data may slightly undercount.
Email Security leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 |
DNSSmartHost
|
0.22% | 33.41% | |
| #2 |
MailSpamProtection
|
0.21% | 31.98% | |
| #3 |
Proofpoint Essentials
|
0.14% | 21.72% | |
| #4 |
AntiSpamCloud
|
0.08% | 11.69% | |
| #5 | Validity | 0.03% | 4.77% | |
| … | ||||
| #14 | Premium SMTP Current page | 0.01% | 0.95% | |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Email Security tool. All 44 in Email Security →
Often used with
| Tool | Launches |
|---|---|
WordPress
|
4 |
| HTTP/3 | 4 |
Google Search Console
|
3 |
| WP Fastest Cache | 3 |
Cloudflare
|
2 |
Tools most often detected on the same launches as Premium SMTP.
