Deliverability and infrastructure

One-click unsubscribe

Definition

One-click unsubscribe lets recipients opt out from the inbox interface in one step, using the List-Unsubscribe and List-Unsubscribe-Post headers from RFC 8058.

One-click unsubscribe in practice

RFC 8058 defines how it works: the email carries a List-Unsubscribe header with an HTTPS link and a List-Unsubscribe-Post header, so the mail client can send the opt out request without opening a web page. Google and Yahoo require it from bulk senders for marketing and subscribed messages, and Google asks that unsubscribes are honoured within two days.

For cold outbound, a clear way to opt out matters even when the header is not required. If opting out is harder than marking spam, people mark spam. Whatever method you use, the opt out must feed a suppression list that every channel and every tool checks.

RFC 8058: One-click unsubscribe

Direct connections. Open the full map

Last updated 2026-10-14 by Ishan Vats.

Connected to

Part of

DeliverabilityDeliverability is the ability of your email to reach the recipient's inbox rather than spam or a rejection, shaped by authentication, reputation and content.

Feeds into

SuppressionSuppression is the shared do-not-contact state that stops an account or person from being sequenced, after a reply, opt out, bounce or open deal.

See where one-click unsubscribe fits in a real build.

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01You talk. Who you sell to and what you send today.
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Ishan Vats, founder of IV Consulting. We run our own outbound on the same system.

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