Glossary Compliance

Unsubscribe in cold email: why and how

Also called Opt-out

An unsubscribe, or opt-out, is a way for a recipient to tell a sender to stop emailing them, which the sender must then honor for all future messages.

In cold email, an opt-out can be a link, a one-click header that mail apps show as an Unsubscribe button, or simply a line inviting the reader to reply "no".

Under the US CAN-SPAM Act, commercial email must include a working opt-out, and requests must be honored within 10 business days.

Why it matters

  • It is required by law in many places, including the US.
  • People who can unsubscribe easily do not need to report spam.
  • Honoring it protects your reputation and the reader's trust.

How Reach Crew handles it

Every first email Reach Crew sends ends with a plain line, "Not for you? Just reply "no" and we won't write again.", and carries one-click unsubscribe headers. A reply of no, stop or unsubscribe, or a click, stops all follow-ups and adds the address to the do-not-email list.

Updated November 10, 2026.