Email
Who left Mailman, and who still runs it
1 websites in the top 1M run Mailman, observed directly from the rendered page in the July 2026 crawl.
Some companies running Mailman
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Apache HTTP Server 100%Bootstrap 100%D3 100%Font Awesome 100%HSTS 100%Python 100%jQuery 100%jQuery UI 100%
Share of a 1-domain sample of Mailman users that also run each.