How many impressions can a signature campaign expect?

Count on around thirty outgoing emails per employee per day. A hundred-person company therefore generates in the order of 300,000 impressions a year, in front of an audience already in touch with it.

Does signature marketing replace a newsletter?

No, it complements it. The newsletter carries developed content to a list of subscribers; the signature banner carries a short message to all your operational correspondents, including those subscribed to nothing.

Is recipient consent required?

A banner inserted in an email an employee sends in the course of their work is not unsolicited commercial prospecting: the message has a chosen recipient and a professional purpose. Still, have your use validated by your DPO, particularly if the banners become purely promotional.

Who should steer these campaigns?

Marketing or communications, without depending on IT. That is precisely what a dedicated tool allows: creating the banner, choosing the audience and scheduling the dates with no IT ticket.

Email signature marketing: the complete 2026 guide

Turning the company's outgoing email into a communication channel: real volume, audience, formats, targeting, scheduling and measuring signature marketing.

Every employee in your company sends dozens of emails a day to people who have a reason to reply to them. That is a qualified, recurring and free audience — and in the vast majority of organisations, it carries no message.

The real volume of the channel

The order of magnitude is higher than people assume. An office worker sends around thirty emails per working day. Over a year and a hundred-person company:

100 employees × 30 emails × 220 days ≈ 660,000 sends

Not all of those are useful impressions — internal exchanges account for a significant share. Taking half conservatively as external, you stay above 300,000 annual impressions.

For comparison, that volume exceeds what many organisations of that size buy in display advertising over a whole year.

What creates the value: the audience, not the volume

The figure impresses, but it is not what counts. A display banner reaches strangers; a signature banner reaches people already in touch with you: active customers, live prospects, suppliers, candidates, partners.

Three practical consequences.

The message can be precise. You do not have to explain who you are. You can announce an event, a release, a hiring drive, without the preamble a cold audience would require.

The context is favourable. The banner appears in a message the recipient has good reason to read, sent by someone they know. It is not an insert wedged into content they were consulting for something else.

Click-through is not the only measure. A banner seen thirty times by a customer without ever being clicked has delivered its message. Measurement is covered in measuring ROI.

The cost: production, and nothing else

This is the channel’s most unusual property. There is no media buying, no auction, no cost per thousand. The only expense is designing the artwork — a few hours of design work, or a reused template.

That changes the reasoning. On a paid channel, you arbitrate the budget. Here, you arbitrate attention: the only limited resource is the number of messages you can push without tiring people.

The four conditions for a usable channel

1. Consistent signatures. Broadcasting a campaign across an estate of diverging signatures cancels its effect. The base has to be stabilised first — see standardising signatures.

2. Targeting by team. A single banner for the whole company wastes most of the potential. Sales, support and HR do not address the same correspondents.

3. Scheduling. Start date, end date, automatic succession. Without that, campaigns drag on months after the event.

4. Measurement. Click tracking by campaign and by team lets you plan the next calendar rather than starting again blind.

Those four points are what the campaigns and banners page covers.

The rhythm that works

The classic mistake is wanting to say everything at once. A banner carries one message. Two simultaneous messages deliver neither.

A quarterly rhythm gives good results: one main campaign across the whole company, and one or two targeted campaigns in parallel on specific teams. That is four to eight messages a year, which leaves each of them room to exist.

The seasonal calendar is developed in 12 campaign ideas, season by season, and the planning method in planning your campaigns across a quarter.

Worth knowing: the most profitable banner is almost never promotional. A booking link under the sales team’s signature, or a review request under support’s, generally produces more measurable results than a product announcement.

The framework to validate internally

Two points deserve explicit validation before launching.

The legal framework. A banner inserted in a professional email addressed to a chosen recipient is not unsolicited prospecting. The subject nonetheless deserves an opinion from your DPO if the banners become purely promotional — see email signatures and the GDPR.

The internal approval circuit. Who can launch a campaign, over what scope, with what lead time. Without a written rule, either nobody dares or every department broadcasts its own. That point is in the signature policy model.