Cold email in Belgium: is it still allowed under GDPR?

Can you still send cold emails to companies in Belgium under GDPR? Yes, business-to-business cold email is allowed, provided you follow the rules: a professional address, a relevant message, a working opt-out and a clear statement of who you are. In this article you will learn when cold email in Belgium is permitted, what the Belgian rules say, and how to approach it so that it is both legal and effective. (This is general explanation, not legal advice.)

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Is cold email to companies allowed?

Short answer: yes, to business contacts it is allowed, unlike to consumers. The basis lies in two things: the GDPR and the Belgian Code of Economic Law.

Under the GDPR you may process personal data on the basis of a legitimate interest (article 6, paragraph 1, f). Direct B2B marketing can be such a legitimate interest, on condition that you respect the recipient’s interest. Stricter rules apply to consumers, where you usually need consent (opt-in).

The difference lies in the type of recipient, not the channel. If you email a functional or business address in a B2B context, the threshold is lower. If you email a private individual’s personal address, the opt-in rule applies and you generally cannot send anything without prior consent. For a named business address the rule is simple: the more relevant and targeted you are, the stronger your legitimate interest stands.

The Belgian rules at a glance

If you send to a business, professional address, you have to meet a few conditions. Below is what each rule means in practice.

Professional address and relevant message

Aim at a company for whom your offer is genuinely relevant, not at a random list. Concretely: a software agency emailing other software companies about integrations is relevant; that same agency emailing hairdressers is not. The common mistake is firing off a purchased list of thousands of addresses and hoping for a percentage. That undermines both your legitimate interest and your response rate.

Make it immediately clear who you are

The recipient must see at a glance who you are and why you are getting in touch. A real name, a real company, a reason. Do not hide behind a vague no-reply address or a misleading subject line. The mistake we see often: a subject line that gets clicks but has nothing to do with the content. That is exactly what the law and the recipient punish.

Offer a working opt-out

The recipient must be able to unsubscribe easily, and you must respect that unsubscribe. One click or one line is enough, as long as it actually works. Add it at the bottom of every email. The classic mistake is an unsubscribe link that leads to a 404, or a request you only process after three more emails.

Handle data properly

Keep track of why you are allowed to email someone (your legal basis) and act on every deletion request. Do not keep addresses longer than necessary and do not resell your list. This is the invisible side of compliance: not a pretty email, but the difference between an inspection that ends well or badly.

The Belgian Data Protection Authority has in recent years effectively issued fines for unsolicited or sloppy commercial emails. So the rules are genuinely enforced. If you are in doubt about your situation, have it reviewed by a lawyer.

Compliant cold email: do versus don’t

Allowed versus effective: not the same thing

Meeting the rules does not mean your email will generate leads. A mass, irrelevant mailing may be just about legal, but it backfires: low response, a damaged brand and lots of unsubscribes.

The condition “relevant and targeted” is therefore not a burden, but exactly what makes a good cold email strong.

How do you write a cold email that works?

Compliance settles the “allowed”. The content settles the “works”. Four building blocks make the difference.

An opener that is not about you

Start with the recipient, not with your company. Refer to something concrete: their job posting, their new office, a statement by their CEO. The mistake that sinks most cold emails is the opening line “We are X and we do Y.” Nobody reads on.

Relevance over volume

Show that you understand what they are dealing with. One well-aimed pain point weighs more than three generic benefits. Build your list around a sharp ideal customer profile, so that every email lands with the right person. This ties directly into qualified leads: emailing more precisely leads to better conversations.

Give value first

Help before you ask. A concrete insight, a relevant example, a short tip they can use straight away. That way you prove in two sentences that a conversation is worth it, instead of merely claiming it.

A soft CTA

Do not immediately ask for an hour-long demo. A low threshold converts better: “Would this be relevant for you?” or “Shall I briefly sketch what that would look like?” The big mistake is a double or hard CTA that forces the recipient into a big step. Keep it small and easy to say yes to.

Deliverability: do you even arrive?

The best email is worthless in the spam folder. The basics: a correctly configured domain (SPF, DKIM and DMARC), a warmed-up sending address, and a clean list without dead addresses. Do not send hundreds of emails a day from a fresh domain and avoid spam triggers such as excessive links or image-only emails. We covered this in more detail in cold email deliverability and in improving email deliverability.

Follow-up: where the leads are

Most replies do not come from the first email. A short, polite sequence of two to four follow-ups, each with a new angle instead of “just bumping this”, gets more out of it. Stop when someone does not respond or unsubscribes. Anyone not yet ready to talk, you keep warm with lead nurturing. For building such a sequence, see our cold email follow-up sequence.

Measuring: you get what you steer on

Do not steer on opened emails alone (open rates have become unreliable), but on replies, positive replies and ultimately meetings. That is the funnel that counts. In practice we steer on leads and meetings, not on vanity figures. That way you quickly see which list, opener or offer really works and which you can scrap.

That funnel also makes immediately clear why volume is not your goal: every step filters more strictly, and only the bottom step delivers what really counts.

Common mistakes

• Volume over relevance. Thousands of addresses at once weakens both your legal basis and your response rate.
• No warm-up. Sending in bulk straight away from a new domain lands in spam.
• Steering on opens only. Unreliable; measure replies and meetings.
• No follow-up. One email and then stopping leaves the bulk of the leads on the table.
• Dead or slow opt-out. The most expensive small mistake, legally and reputationally.

From compliant to more customers

Compliant emailing is not a goal in itself. The goal is more customers, without legal risk or brand damage. Targeted and correct works on both fronts.

In the programmes we roll out, we often see a doubling to tripling of the number of enquiries. That fits with how cold outreach works when you follow up in a targeted, relevant way. That is how our approach for Get Driven delivered 400% more conversions.

Cold email is one of the channels in a broader lead generation approach, not a standalone trick. It works best as part of a well-considered lead generation strategy.

Frequently asked questions

Can I use a purchased email list for cold email?

Better not. With a purchased list you do not know the origin or the legal basis, and that undermines both your legal position and your response rate. Instead, build a small, targeted list yourself around your ideal customer profile.

Is cold email to consumers (B2C) allowed in Belgium?

Usually not without prior consent. For consumers the rule is opt-in: you need their agreement before you send commercial emails. The more flexible B2B approach via legitimate interest applies to business contacts.

How many follow-up emails may I send?

The law does not state a fixed number, but keep it limited and polite: two to four follow-ups, each with new value. Stop as soon as someone unsubscribes or is clearly not interested. Pushing on damages your reputation more than it earns you.

Want to do cold outreach safely and effectively?

Tell us your target audience, and we will set up an approach that stays within the rules and still gets replies.

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