MailjetOpen-tracking pixel, click tracking and unsubscribe
Mailjet can insert an open-tracking pixel; removing it campaign by campaign is only partly possible. In our corpus, 150 of the 260 emails sent through Mailjet, by 28 brands, loaded an open-tracking pixel (58%).
API / Transactionnel · vendor's site ↗ · code mailjet
French sending platform, now part of the Sinch group. It handles campaigns and transactional messages alike, often through its API.
Postmetry reference sheet
What the vendor says, checked by us
3 sources · last reviewed on 10/17/2026. Still not checked: List-Unsubscribe, RFC 8058 — one click, Preferences page, Transactional exceptions, DKIM, SPF, DMARC, Sending domain, Tracking domain, Logging, API, Consent history.
Postmetry corpus
What brands actually send
260 messages received from 08/02/2026 to 10/30/2026.
Postmetry reference sheet
What this ESP allows
Catalog shared by both pages. Each note carries its source, its date, and its confidence level.
On the right, what our emails say about it: matching, contradicted, never observed despite the volume, too few emails to conclude — or out of reach, when the capability can't be read from an email.
Tracking 2 not met · 2 partial
Open pixel Yes 1 note · 23/08/2026 Consistent seen on 123 of 223 emails from 14 brands, 3 months
Le suivi des ouvertures est généralement effectué à l'aide d'une petite image invisible
Caveat Set at main-account level only, a single parameter covering "e-mails transactionnels et campagnes" (transactional emails and campaigns), propagated to all API keys and sub-accounts (observed in the tool on 23/08, consistent). The default state of a new account remains undocumented. Changes take effect within up to 10 minutes. Not retroactive: emails already sent keep their configuration — their opens continue to be recorded after disabling.
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · last reviewed on 08/23/2026 · confidence medium
Click tracking Yes 1 note · 23/08/2026 Consistent seen on 122 of 223 emails from 14 brands, 3 months
exclude links from being tracked and rewritten by using the NOTRACK parameter
Caveat Links rewritten to Mailjet's servers (pattern mjt.lu or a branded CNAME — esp_signatures); exclusion per link via the marker's parameter; three states at account level, as for opens (French CNIL page); "Désactivé" (Disabled) = no rewriting at all.
How to exclude a link from being tracked when click-tracking is enabled · Help centre · last reviewed on 08/23/2026 · confidence medium
Exclusion by campaign Partially 1 note · 17/10/2026 Out of reach
Ce booléen indique si vous souhaitez activer ou non le tracking sur un message donné. Ce réglage outrepasse ceux de votre compte utilisateur.
Caveat The X-Mailjet-TrackOpen header sets open tracking message by message, and the same page groups a campaign's messages by X-Mailjet-Campaign: a campaign sent through the SMTP relay or the API can go out without open tracking. No per-campaign option is described in the editor; the CNIL page states that tracking settings "sont gérés au niveau du compte" (are managed at account level). The page does not say whether a message set this way is sent without an image, nor whether the header can restore tracking that the account or the contact has reduced. The TrackOpens parameter (account_default, enabled, disabled) does the same for sends triggered by webhook in a workflow ("Emails automatisés", rewritten on 29/09/2026).
En-têtes des emails (X-headers) · Help centre · page dated 02/22/2023 · last reviewed on 10/17/2026 · confidence high
Exclusion by contact Partially 1 note · 17/10/2026 Out of reach
Si le suivi des ouvertures au niveau du compte est Activé et que le contact refuse le suivi, ses ouvertures sont traitées de manière anonyme lorsque le suivi anonyme est disponible. Si le suivi anonyme n’est pas disponible sur le compte, le suivi des ouvertures est désactivé pour ce contact.
Caveat A contact's recorded refusal removes individual tracking, not necessarily the image: an account with anonymous tracking (Starter plans and above) applies that mode to the contact, and the page does not say whether this mode still loads an image. Without anonymous tracking (Free plan), tracking is disabled for that contact and the email is sent "sans pixel de suivi des ouvertures" (without an open-tracking pixel). The sentence quoted on 11 September — account settings "ne permettent pas de désactiver le suivi pour un seul destinataire" (do not allow tracking to be disabled for a single recipient) — is no longer on the page rewritten on 15 October. Through the SMTP relay or the API, a header also sets tracking message by message (see exclusion-par-campagne).
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · page dated 10/15/2026 · last reviewed on 10/17/2026 · confidence high
Consent — absence means no pixel No 1 note · 11/09/2026 Out of reach
Le paramètre de votre compte détermine le niveau maximal de suivi que Mailjet peut utiliser, tandis que la préférence d’un contact individuel peut uniquement réduire le niveau de suivi appliqué à ce contact. … Si le suivi des ouvertures au niveau du compte est déjà défini sur Anonyme, un contact ne peut pas activer lui-même le suivi au niveau du destinataire.
Caveat The model is opt-out: with no recorded preference, the account setting applies, and an account set to Anonymous cannot switch only the consenting contacts to individual tracking.
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · page dated 09/04/2026 · last reviewed on 09/11/2026 · confidence high
Native consent collection Yes 1 note · 11/09/2026 Out of reach
Mailjet permet aux contacts de gérer individuellement si leur activité d’ouverture et de clic peut être suivie, sans se désabonner de vos e-mails. … Lorsque vous envoyez un e-mail, Mailjet vérifie automatiquement les valeurs Consentement au suivi des ouvertures et Consentement au suivi des clics de chaque contact, ainsi que les paramètres de suivi au niveau de votre compte.
Caveat Two collection routes: a Mailjet form field, and a "Préférences de suivi" (tracking preferences) system link to a page hosted by the vendor, which cannot be customised. The choice is recorded on the profile and applied when the email is generated, within the limit of the account setting.
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · page dated 09/04/2026 · last reviewed on 09/11/2026 · confidence high
Tracking anonymization No 1 note · 17/10/2026 Out of reach
Mailjet suit les ouvertures de manière anonyme, ce qui vous permet de mesurer l’activité globale d’ouverture tout en réduisant la quantité de données de suivi collectées au niveau du destinataire. … Pour le suivi des ouvertures, Mailjet ajoute le pixel de suivi approprié, applique le suivi anonyme lorsque cela est applicable ou envoie l’e-mail sans pixel de suivi des ouvertures.
Caveat The Anonymous mode (Starter plans and above) is set at account level, and also applies to a contact who refuses tracking. It reduces the data collected at recipient level; it does not delete it: opens are still "enregistrées anonymement" (recorded anonymously), and only the Opened list stops showing the contact ("limitant les informations affichées au niveau du destinataire", limiting the information displayed at recipient level). The page describes sending without an image only for the Disabled option ("Aucun pixel de suivi des ouvertures ne sera ajouté à l’e-mail": no open-tracking pixel will be added to the email), and treats anonymous tracking separately from sending without a pixel. It never states whether the image in Anonymous mode is individualised or not: the "no" is a deduction against the definition (no longer loading an individualised image), as for Brevo. The "yes" of 23 August rested on the existence of the mode. To be settled on an email received in Anonymous mode.
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · page dated 10/15/2026 · last reviewed on 10/17/2026 · confidence high
Traceable choice Yes 1 note · 17/10/2026 Out of reach
Une fois qu’un contact a envoyé son choix via la page des préférences de suivi ou un formulaire Mailjet, la préférence est enregistrée directement dans son profil de contact Mailjet. … Vous pouvez exporter une liste de contacts afin de consulter ou de traiter les préférences de suivi des ouvertures et des clics actuellement enregistrées pour vos contacts.
Caveat Two system properties, opens and clicks, read at each send and exportable as CSV under the names mjoptinopen and mjoptinclick: 1 for accepted, 0 for refused, empty for not recorded. The export gives the current state; the page does not say that Mailjet keeps successive states, and leaves the burden of proof to the sender ("Vos enregistrements de consentement doivent vous permettre de démontrer": your consent records must enable you to demonstrate). The caveat of 11 September, "The page does not say whether they can be exported", no longer holds.
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · page dated 10/15/2026 · last reviewed on 10/17/2026 · confidence high
Unsubscribe 4 not verified
Authentication 5 not verified
Infrastructure & governance 3 not verified
Granularity of settings Yes 1 note · 11/09/2026 Out of reach
Les préférences des contacts fonctionnent dans le cadre de votre configuration de suivi au niveau du compte. Elles peuvent réduire le niveau de suivi appliqué à un contact individuel, mais elles ne peuvent pas activer un niveau de suivi désactivé ou restreint au niveau du compte.
Caveat Two levels: the main account, the only place where it is set, which sets the ceiling for all API keys; and the contact, whose preference can only reduce tracking. The page does not mention a per-campaign setting.
Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante · Help centre · page dated 09/04/2026 · last reviewed on 09/11/2026 · confidence high
Postmetry corpus
Observed in our corpus
Recorded by our analyzers on messages received on addresses we control. Nothing from the reference sheet here, no access to the tool.
Out of the 260 messages received
150 messages out of 260
259 messages out of 260
259 messages out of 260
0 messages out of 145
Period observed
08/2026 → 30/10/2026
3 months, 28 distinct brands.
Identification signals
What we recognized the sending platform by, message by message.
- mailjet 100 %
Limits of this analysis
It doesn't say what a brand has actually configured. A sending platform that allows turning off the pixel says nothing about which brands have done so — that's what a brand's report answers.
It doesn't rank. No score, no recommendation: capabilities don't carry the same weight depending on the use, and that weight isn't ours to set.
A “not checked” cell is not a “no”. It says nobody has gone to look yet, and nothing else.
The corpus does not establish a capability. A rate of observed pixels says what brands send, not what the tool can do.
Sources
3 sources- Pixels de suivi des e-mails et consentement : recommandations de la CNIL et du Garante Help centre · confidence medium 23/08/2026
- How to exclude a link from being tracked when click-tracking is enabled Help centre · confidence medium 23/08/2026
- En-têtes des emails (X-headers) Help centre · confidence high 17/10/2026
Comparable sending platforms
Compare the whole family →Frequently asked questions
Can you turn off open tracking in Mailjet?
Does Mailjet rewrite links for click tracking?
Do your emails go through Mailjet?
The sending platform is read from the headers, not from a claim. The report names it, and says where to fix the findings with that vendor.