MCP

Negative replies and unsubscribes

Last verified: 2026-08-05

TL;DR

  • Any request to stop is an opt-out, whatever words it arrives in. Honor it immediately and suppress permanently — in the US regime the legal deadline is 10 business days and the mechanism must keep working for at least 30 days after the send [1]; Canada's is likewise 10 business days [2].
  • Do not reply to argue, and do not ask why. "Understood — you're removed" is the entire correct response, if you send one at all.
  • A clean exit is cheap. A spam complaint is not: complaint rate is the number with the least headroom in the whole sending system.

Recognizing an opt-out

There is no required wording. "Unsubscribe", "remove me", "stop", "please don't contact me again", and a plain "no thanks" from someone who has not engaged all mean the same thing. So does a reply that only says "no" — the ambiguity is yours to eat, not the recipient's to resolve.

The distinction that matters is between an objection and an exit. "Not interested" is an objection you may answer once (Objection responses); "not interested, take me off your list" is an exit and gets no reply beyond confirmation. When you genuinely cannot tell, treat it as an exit. The downside of one over-suppressed prospect is a lead you lose; the downside of one under-suppressed prospect is a complaint that costs you delivery to everyone else.

What suppression has to mean

Permanent, and account-wide. Suppression that applies only to the campaign that triggered it is not suppression. The person must be excluded from every future campaign, including ones built from a freshly purchased list months later, which in practice means suppression lives at the account level and survives list rebuilds.

Domain-level, sometimes. When the request comes from someone senior on behalf of the company — "nobody here is interested" — suppress the domain, not just the address. Continuing to email their colleagues is the fastest way to earn a complaint from the same organization.

Checked before the send. Suppression is a pre-send filter, not a post-send apology. The mechanics belong with Stopping rules and suppression and the pre-launch checks in Pre-launch QA.

The hostile reply

Cold outreach occasionally produces genuine anger, and it is usually deserved by the category rather than by your specific email. The correct response is a short, non-defensive acknowledgement or nothing at all, followed by suppression. Explaining that the message was legal, or that they must have opted in somewhere, converts a private annoyance into a public one and does not change the outcome.

Two things not to do: do not ask for feedback, and do not offer to send something else instead. Both read as continuing the conversation someone just asked to end.

The graceful exit you write yourself

Ending a sequence on your own terms is a different act, and the school that argues against theatrical goodbyes makes the useful point: a closing note works when it drops the pitch and asks about the problem's status rather than performing disappointment [3, 4]. The debate over whether to send one at all lives in Breakup emails.

Whichever side you take, one rule holds: the door you leave open must be one they walk through. "If timing changes, this address works" is an open door. A re-add to a nurture list is not.

References

  1. FTC — CAN-SPAM Act: A compliance guide for business (official guide, current)
  2. CRTC — Canada's Anti-Spam Legislation: compliance guide (official guide, current)
  3. Josh Braun — Going Cold (blog, n.d.)
  4. Josh Braun — The follow-up email (blog, n.d.)