Are email marketing and a newsletter the same thing? Nearly: a newsletter is one type of email marketing, sent at regular intervals to subscribers who signed up to be informed. Email marketing in the broad sense covers any message sent in bulk by email: a back-to-school promotion, a webinar invitation, a nudge to an inactive contact. The difference lies in the goal, the rhythm, the contact base and the metrics you track. Both formats share one thing: the quality of the address list decides whether the message reaches the inbox.
What do these two terms actually cover?
Email marketing is the whole family: a message, identical or personalized, sent to a group of recipients through a sending platform. The family has 3 branches. The newsletter informs, the promotional campaign sells, and the transactional email confirms an order, a password reset or an invoice.
The newsletter is recognizable by its contract with the reader: a content promise, an expected sending day, a voluntary signup. Its full definition has its own article: what a newsletter is and what to know before launching one.
The transactional email stands apart: an action by the recipient triggers it, and it belongs to the delivery of the service. The best practices for transactional emails cover its specific constraints.
Newsletter, promotional campaign, transactional email: the comparison
The table below lines up the 3 types on 5 criteria. The newsletter comes first because it is the best-known type of email marketing, so the others are measured against it.
| Criterion | Newsletter | Promotional email | Transactional email |
|---|---|---|---|
| Goal | Inform, nurture the relationship | Sell, get signups, reactivate | Confirm, notify, secure |
| Rhythm | Regular: weekly or monthly | One-off, tied to an offer or a launch | Immediate, triggered by an action |
| Contact base and consent | Subscribers who asked for the letter | Segment picked from the database, consent or legal exception | Customers or users concerned by the action |
| Main KPI | Click rate, unsubscribe rate | Click rate, conversion, complaints | Delivery rate, delivery time |
| Example | Weekly roundup of industry news | Webinar invitation, back-to-school promo code | Order confirmation, password reset link |
Concrete examples of each type
A Thursday 8 a.m. letter summarizing a blog’s new articles is a newsletter, also called a “letter of information” or “infoletter” in French. It goes out even with no event to announce. A neighborhood association’s monthly digest follows the same logic.
A webinar invitation with a registration deadline is a promotional campaign, like a renewal offer sent 30 days before a contract expires. An abandoned-cart reminder, sent for instance 24 hours after the visitor leaves the site, is debatable. A behavior triggers it and its purpose is commercial, as in the customer loyalty scenarios in email marketing.
A newsletter with a sales block stays a newsletter as long as information dominates. When the offer takes up most of the message, it is a promotional campaign borrowing a newsletter’s calendar.
Consent, GDPR and unsubscribing: do the rules differ?
Yes, they vary with the type of sending and the target. In France, B2C email prospecting requires prior consent under the 2004 law for confidence in the digital economy, codified in article L.34-5 of the Postal and Electronic Communications Code. The signup box must not be pre-ticked, according to the CNIL, the French data protection regulator (commercial prospecting according to the CNIL, in French, dated June 10, 2026).
An exception exists, but its scope is narrow: sending without consent is only possible for products or services similar to those the customer already bought. Creating an account or signing up without a purchase is not enough, according to the CNIL. Each message must also state the sender’s identity and offer a simple, free way to refuse further messages, hence the “Unsubscribe” link in the footer.
For a newsletter, the voluntary signup serves as consent, provided you keep proof of it (date, address, form used); article 7 of the GDPR puts that burden on the data controller. In force since May 25, 2018, the GDPR adds a right to object to prospecting in article 21, exercisable at any time. For a promotional campaign sent to a purchased or inherited database, the problem is the reverse: no proof, so no solid legal basis. The transactional email escapes this regime as long as it stays in its role; an advertising banner slipped into an order confirmation shifts it, in practice, back under the prospecting rules. In B2B, the CNIL replaces consent with a right to object: the professional is informed at the point of collection and can refuse at every send, provided the message relates to their role. The rules on proof and unsubscribing are detailed in the article on GDPR and email marketing.
Which KPIs to track for each type
A newsletter is tracked by click rate and unsubscribe rate, promotional email by conversion and complaint rate, and a transactional email by delivery rate and delivery time. A single dashboard for these 3 types produces wrong conclusions.
For a newsletter, the trend of the click rate and of the unsubscribe rate, from one issue to the next, tells you the state of the relationship. For a promotional campaign, conversion weighs more than the open rate, as does the complaint rate. For a transactional email, one question dominates: does the message arrive quickly?
Before a promotional send, an A/B test on a sample of the list, for instance two different subject lines, shows which one gets more clicks before the full send.
A warning on the open rate. Since iOS 15, released in September 2021, Apple Mail Privacy Protection preloads, according to Apple, the remote content of messages for users who turn it on. An open is then recorded without the recipient having read anything. The figure is inflated in proportion to the share of the audience reading on Apple Mail. The details are in the article on the impact of Apple Mail Privacy Protection. For formulas and thresholds, see the email marketing KPIs.
Segmentation, where the two formats converge
A newsletter sent to everyone and a promotion sent to everyone share the same flaw: they ignore who reads what. Segmentation splits the database on a usable criterion (a purchase in the last 12 months, a declared interest, signup age) and varies the content accordingly.
On a newsletter, it lets you offer distinct sections instead of one general letter. On promotional email, it leaves out people with no chance of buying, which limits unsubscribes and complaints. The criteria that work are compared in the article on segmenting email lists.
Deliverability and list hygiene: what both formats share
Newsletter or campaign, the message goes through the same filter: sender reputation. Since February 1, 2024, Google requires every sender to Gmail to authenticate with SPF or DKIM and to keep the spam rate under 0.3% in Google Postmaster Tools. Above 5,000 messages a day, SPF, DKIM and DMARC are all required (per Google’s sender guidelines, “Requirements for all senders” section).
Google asks senders to stay under 0.3% and recommends aiming below 0.1%; a poorly maintained list gets close to that threshold faster. A hard-to-find unsubscribe link pushes spam reports up, because the recipient is left with only Gmail’s “Report spam” button. Technically, the List-Unsubscribe-Post header, defined by RFC 8058 published in 2017, allows one-click unsubscribing directly from the mail client’s interface. Invalid addresses produce hard bounces (permanent rejections), and each one tells mailbox providers that the sender does not control its database. On a list of 10,000 addresses, 2% invalid addresses means 200 rejections at every send (a simple illustrative calculation). Dormant addresses eventually react with complaints. Providers’ feedback loops, explained in the article on ISP feedback loops, send those complaints back to the sender.
The newsletter looks protected by its voluntary signup. Double opt-in sends a confirmation email to the address entered and filters out typos. The GDPR does not require it, yet it also works as proof of consent. With a simple checkbox, the protection erodes: a wrong or disposable address enters the list on day one. For promotional email sent in waves, the gap is more visible: each one-off send reaches addresses that have gone 6 months or more without a message.
5 steps, in this order, structure a list cleanup:
- Check the syntax and domain of each address before any signup or import.
- Remove addresses whose mail server answers that they do not exist, the source of hard bounces.
- Watch repeated soft bounces on the same address and suspend it after several failures.
- Set long-term inactive contacts aside, then try a re-engagement campaign before deleting them; 12 months without a click can serve as a starting point (opens, skewed by Apple Mail, no longer prove activity).
- Read the spam rate in Postmaster Tools and the complaint rate reported by feedback loops.
Acceptable bounce thresholds by platform are compared in the article on the acceptable bounce rate in email. Before the next send, whether a letter or a promotion, run a 5% sample of the list through address verification: it measures the risk well before a mailbox provider does.
When to choose one or the other
The newsletter fits when you want to maintain an audience: a weekly letter means 52 issues in 1 year, so editorial material to produce without interruption. Promotional email fits when an event or an offer justifies a dated send: a launch, sales, a registration deadline. The transactional email is not a choice; it accompanies every action that calls for it.
An organization often combines all 3 types, each on its own segment and cadence. The point is not to mix their lists: a subscriber who joined for a weekly letter did not agree to receive 4 extra promotions a month.
Frequently asked questions
Is a newsletter a form of email marketing?
Yes. It is the editorial, recurring branch, whereas one-off promotions and transactional emails follow other logics.
Do you need double opt-in for a newsletter?
No, the GDPR does not require it. It remains useful: the confirmation email filters out typos and provides dated proof of consent.
