The email channel remains one of the few digital spaces where a company addresses a person who has explicitly agreed to receive its messages. In a context where social media platform algorithms filter the visibility of posts, the newsletter retains a unique feature: it arrives in the recipient’s inbox without intermediaries. The question is not so much whether this format works, but rather understanding under what conditions it produces measurable results.
European regulatory framework for newsletters: an unknown stability
Several companies hesitate to invest in emailing for fear of an imminent regulatory change. The applicable law for email marketing in Europe remains Directive 2002/58/EC supplemented by the GDPR, and the proposed ePrivacy regulation, intended to modernize this framework, has not yet been finalized.
This legal stability sends a clear signal to organizations planning their communication strategy over several years. The newsletter channel will not suddenly be subject to new obligations in the short term.
However, one technical point is genuinely evolving. Since the end of the transitional period set for July 14, 2026, the use of tracking pixels to measure opens or personalize content generally requires the prior consent of the recipient.
The CNIL distinguishes between consent to receive the email and consent to tracking: a newsletter can be legal in B2B without marketing opt-in in certain cases, but the tracking pixel remains subject to separate authorization. As detailed in the presentation of the newsletter on the Site de Bankai, this channel retains its relevance as long as its legal and technical fundamentals are mastered.
Newsletter performance measurement: what the rates don’t tell
The usual metrics (open rate, click rate, unsubscribe rate) are mentioned in almost all online guides. They remain useful for managing sends, but they have limitations that most competing content does not address.
The open rate is losing reliability
The open rate relies on the loading of an invisible pixel embedded in the email. With the growing obligation to obtain specific consent for this pixel, an increasing share of opens escapes tracking. The available data does not allow for conclusions about the exact extent of this loss of visibility, but the open rate alone is no longer sufficient as a success indicator.
Companies that rely solely on this figure to evaluate their email strategy risk making biased decisions. A declining open rate may simply reflect an increase in tracking refusals, not a disinterest from subscribers.
Complementary indicators to prioritize
To obtain a more reliable reading of engagement, several metrics deserve to be cross-referenced:
- The click rate relative to the number of delivered emails provides a measure of concrete action, independent of the open pixel
- The direct response rate (replies) indicates a level of engagement that is rarely measured but revealing of the perceived quality of the content
- Tracking post-click conversions (purchase, registration, download) links the newsletter to a verifiable business objective
Cross-referencing this data allows for distinguishing a passive subscriber list from a genuinely engaged audience.
Newsletter and social media: complementarity or competition
The temptation to compare newsletters and social media in terms of gross reach often leads to simplistic conclusions. The two channels do not serve the same functions in a customer journey.
On social media, visibility depends on algorithms that favor content with high potential for immediate interaction. The newsletter escapes this algorithmic logic: each send reaches the entire list (excluding technical bounces). This control over distribution represents a structural advantage for companies whose content does not naturally generate virality.
Conversely, the newsletter does not allow for discovery by new audiences. It targets already acquired contacts. Field feedback varies on the email channel’s ability to generate direct acquisition: some companies observe a word-of-mouth effect through email forwarding, while others see no organic growth in their list without external leverage.
The most documented complementarity consists of using social media to feed the subscriber base, then the newsletter to deepen the relationship with qualified contacts.
Newsletter content: what distinguishes a useful send from an ignored email
The frequency and content determine the longevity of a newsletter. A weekly send without real substance leads to unsubscribes. A quarterly send that is too spaced out makes the sender forgettable.
Newsletters that maintain a stable click rate over time share several characteristics:
- An email subject that precisely describes the content, without clickbait or excessive punctuation
- A clearly unbalanced information/promotion ratio in favor of information (subscribers tolerate promotion when it remains minority)
- Segmentation of sends by interest or previous behavior, rather than sending the same content to the entire base
- A consistent format from one send to another, creating a reading habit
Segmentation remains the least exploited lever by small and medium-sized enterprises. Sending the same content to a cold prospect and a loyal customer amounts to ignoring the most valuable data the company has: the level of relationship already established with each contact.
The stabilized legal framework, the complementarity with other channels, and the ability to measure concrete actions make the newsletter a tool whose profitability depends less on the format itself than on the rigor with which it is utilized. The challenge is not to send an email; it is to maintain content that is sufficiently useful for the subscriber to open it the following month.
