Sites using SURFmailfilter 
Managed email spam and virus filtering for Dutch research and education institutions, operated by SURF.
Found via: Product Hunt 1
SURFmailfilter has been detected on a single launch we've crawled, Centrum Wiskunde & Informatica, on May 29, 2026.
It's most commonly paired with Microsoft 365, Apple Domain Verification, and nginx.
Share of new sites using SURFmailfilter
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
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
|
0.27% | 55.41% |
| #2 | – |
MailSpamProtection
|
0.26% | 54.06% |
| #3 | – |
AntiSpamCloud
|
0.10% | 19.61% |
| #4 | ▲2 | Premium SMTP | 0.02% | 4.14% |
| #5 | ▼1 | SpamExperts | 0.02% | 3.17% |
| … | ||||
| #141 |
SURFmailfilter
Current page
|
<0.01% | 0.01% | |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Email Security tool. All 148 in Email Security →
Often used with
| Tool | Sites |
|---|---|
Microsoft 365
|
1 |
Apple Domain Verification
|
1 |
nginx
|
1 |
Django
|
1 |
Apple Business Connect
|
1 |
Tools most often detected on the same sites as SURFmailfilter.
Recent launches we can show
1 of the 1 sites using SURFmailfilter are product launches we list individually.
