37signals emails so far
SaaS & Tech1 campaign · 37signals.com · RSS
A catalog of ideas — signals — that drive us.
1 37signals campaign archived so far, sent Jul 15, 2026. Send times, frequency and subject-line patterns appear once 12 are in, so nothing here is a guess.
Latest 37signals emails
The stack behind the sends
The sending platform has not been detected yet.
Nothing detected yet.
Domain authentication
Mail failing authentication is sent to spam rather than delivered.
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How this is measured
Every figure comes from real 37signals emails captured in Inbox Archive, not from a survey or a vendor report. Medians and the campaign mix appear once a brand has 12 campaigns archived, and the day and time charts once 12 of them are scheduled sends. Campaign types are sorted automatically. Discounts are read from subject lines, and a copyable code counts only when one appears in the email, so offers applied at checkout are missed.