What email consent management is#
Consent is the documented permission a recipient gives to receive marketing email. Laws differ on whether it must be express (opt-in) or may be implied (existing relationship), and on how long it lasts.
Why it matters#
Consent is the legal basis for marketing mail in most jurisdictions and the practical basis for good deliverability: people who asked for mail rarely complain.
How mailbox providers use it#
Gmail, Microsoft, and Yahoo combine authentication results, sender reputation, and recipient engagement into a placement decision made per message. Email consent management feeds directly into that model, and weaknesses compound with other signals.
How to measure the impact#
- Baseline inbox placement with seed tests before any change.
- Make one change at a time and hold volume steady.
- Re-test after 48 to 72 hours; provider models need time to update.
- Track Postmaster Tools and SNDS alongside your seed results.
Improving it#
- Use an unchecked checkbox or a dedicated signup form; never pre-tick.
- Record timestamp, IP, source, and the exact wording shown at consent.
- Use double opt-in for marketing lists where feasible.
- Separate consent for different purposes (newsletter vs partner offers).
- Refresh consent for contacts older than two years with no engagement.
Frequently asked questions#
Is double opt-in required by law?
Not explicitly in most jurisdictions, but it is the easiest way to prove consent under GDPR and CASL and it improves list quality.