BVDW guide 2026: two new KPIs for the AI-agent inbox
Germany’s digital economy association BVDW published a 24-page email marketing guide on 18 March 2026. The document sorts the status quo — authentication, GDPR, accessibility — and proposes two new KPIs intended to shift the playing field: the AI Agent Approval Rate and the Meaningful Interaction Rate. Both metrics are a reaction to an inbox in which AI assistants increasingly sit between sender and recipient.
What's in the guide
- 24 pages, six authors from United Internet Media, Mapp Digital, ELAINE technologies and AZ Direct.
- Mandatory accessibility chapter — formally driven by the European Accessibility Act (EU Directive 2019/882), in force since June 2025.
- Two new KPI proposals for the AI-agent world: AI Agent Approval Rate and Meaningful Interaction Rate.
- Authentication chapter with SPF, DKIM, DMARC as a required setup, not best practice.
What used to apply
The standard newsletter KPI table had been stable for years: Open Rate, Click Rate, Click-to-Open, Unsubscribe Rate, Spam Complaint Rate, Conversion Rate, revenue per recipient. The values were measured for humans — an Open Rate required someone to load the tracking pixel, a Click Rate required a recipient to actively click a link. Since the introduction of Apple Mail Privacy Protection in 2021 the Open Rate has been a shaky number anyway; with growing AI pre-processing the click also becomes a fuzzy figure.
What applies now
1. AI Agent Approval Rate measures the pre-selection step. The idea behind it: when an AI assistant (Apple Intelligence, Gmail Gemini, Outlook Copilot) pre-processes an incoming mail, summarises it, prioritises or filters it — there is an implicit approval step before the human even sees it. The metric measures what share of sent mails passes this first AI step as “relevant enough to be shown”. It really only becomes measurable insofar as inbox providers feed signals back — the BVDW positions it as a KPI whose data pipeline still has to be built.
2. Meaningful Interaction Rate replaces the click as a success proxy. The logic: when AI agents summarise mails, create calendar entries directly from a mail or generate reply suggestions, the click on a link is no longer the only meaningful success indicator. The Meaningful Interaction Rate bundles all observable follow-up actions — click, calendar entry, reply, save — into one basket. Practically that means: less focus on open and click vanity, more on what really happens after the mail.
3. Accessibility becomes a mandatory discipline, not nice-to-have. The guide treats the EAA as binding and describes concrete requirements: minimum contrast, alt-text duty for relevant images, semantic HTML structure in templates, readability without images. Anyone sending in B2C e-commerce is legally affected; anyone sending purely B2B has formally less pressure — but should not wait, because large ESPs increasingly pull accessibility checks into their default templates.
Context
The two new KPIs are honest crutches: they react to a problem whose data foundation does not yet exist. No one today measures reliably whether Apple Intelligence renders a mail in the AI summary as “friendly” or “dismissive” — and no inbox provider feeds back which mails the agent recommended for display. What the BVDW delivers is therefore vocabulary rather than a measurement system. But that is exactly the value: when the industry and tool providers adopt the KPI terms, the pressure to build the data pipelines emerges.
The second point: the choice of authors — United Internet, Mapp, ELAINE, AZ Direct — is the DACH ESP establishment. What the guide says will sooner or later show up as standard reporting in their tools. Anyone working with one of these ESPs should not read the guide as an academic paper but as a preview of upcoming releases.
What to do now
Read the KPI chapter and translate it into your reporting: Even if AI Agent Approval Rate is not yet measurable, it is worth deliberately capturing follow-up actions beyond the click in your own reporting — reply rate, calendar adds, forward rate. That gives you the data foundation as soon as the industry catches up.
Run an accessibility audit on your newsletter template: Check contrasts (WCAG 2.1 AA as a target), add alt texts, use bullet lists instead of images with text. Start with the welcome flow, that’s where the leverage is highest.
Move authentication to a mandatory setup permanently: If SPF, DKIM, DMARC are not yet aligned, that did not become critical only with the BVDW guide. But it is now officially “no longer best practice but standard” — which becomes relevant when managers or clients want to defend the effort.
Background in the lexicon
Which KPIs stay meaningful and which are just noise: → Email marketing KPIs done right
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