May a business keep emailing me after I unsubscribe?

Objection to direct marketing is an absolute right under GDPR Art. 21(2) — no balancing, no "we'll send one last email to confirm", no "are you sure" pop-ups, no retention flows. Stop = period. What IS allowed? One confirmation email that unsubscribe is processed ("You are unsubscribed. No more marketing emails from us.") — no marketing content. Optional: one year later "we miss you" email = NOT allowed, requires new consent. What is NOT allowed? (1) "Important update" emails that are actually marketing. (2) Other businesses in same group contacting you ("on behalf of our partner"). (3) Sales emails after unsubscribe with "exclusive for you". (4) Re-targeting via Custom Audiences (Meta, Google) — also counts as marketing. When is mail allowed after unsubscribe? (1) Service emails — order confirmation, delivery, invoice. No marketing. (2) Legally required communication (privacy statement update on material change). (3) Security notifications (account hack, breach notification). On overstepping: (a) re-unsubscribe + keep confirmation in mail archive. (b) ACM report via acm.nl (Tw 11.7 for email marketing). (c) AP complaint for GDPR aspect — our letter generator provides strong demand. Fines: AP fines 2023-2025 for structural mailing after opt-out — up to €500k. ACM fines also possible in parallel.