The concept of email distribution

Electronic mail dates to 1972, when Ray Tomlinson sent the first message between two computers on a network. It remains one of the most used services on the internet. Email marketing is a much more recent idea: sending a message to a large number of recipients, at once, for a commercial purpose — and doing it in a way each recipient experiences as addressed to them.

Why it still works

Three things keep email ahead of most alternatives.

The first is cost relative to reach. Sending to a large list costs a fraction of equivalent exposure through advertising or telemarketing, and the marginal cost of one more recipient is close to nothing.

The second is personalisation. A campaign can adapt its content to what you already know about each subscriber — what they bought, where they are, how they have engaged before — without any increase in production cost.

The third, and the one that compounds over time, is measurability. Opens, clicks, bounces, unsubscribes and conversions are all observable, so each campaign informs the next. Very few channels give you that feedback loop at that speed.

There is a fourth advantage that is easy to overlook: a subscriber list is an asset you own. Social platforms and advertising networks can change their reach, their pricing or their rules overnight. Your list travels with you.

What separates a campaign from spam

None of the above holds if the messages were not invited. The legal framework across Europe, Switzerland and Canada converges on the same three conditions: the recipient consented in advance, the sender is clearly identifiable, and every message offers a free and straightforward way to stop receiving them.

Those conditions are also good practice independent of the law. A list built on genuine consent engages better, complains less, and keeps your sender reputation intact — which is what determines whether your next campaign reaches the inbox at all.

See also:

- Definition of spam, emailing abuse

- Comply to French law with your email marketing campaigns

- Professional emailing tightly controlled by Swiss law

- Ensure compliance with Belgian law during professional email campaigns

- Conduct professional email campaigns in accordance with Canadian law