Mailjet

Overview

Mailjet is an email delivery platform (now part of Sinch) that provides both transactional email infrastructure and marketing email campaign tools. On websites, Mailjet's client-side presence is limited to embedded subscription forms that capture email addresses for mailing lists. Unlike full marketing automation platforms, Mailjet does not deploy behavioral tracking pixels or visitor profiling scripts on the host website. Its web-facing footprint is lightweight — focused on form rendering, validation, and submission.

What This Script Does

Mailjet's website integration consists of embeddable subscription forms loaded from app.mailjet.com or rendered via Mailjet's form widget JavaScript.

Functionality:

• Renders email subscription forms (single field or multi-field with name, preferences)
• Performs client-side email validation before submission
• Submits captured email addresses to configured Mailjet contact lists
• Supports double opt-in flows by triggering confirmation emails upon form submission
• Displays success/error states after submission

Cookies set:

• Minimal session cookies for form state management during the submission process
• No persistent tracking or visitor identification cookies
• No cross-site tracking mechanisms

Data collected:

• Email addresses and any additional form fields (name, preferences) submitted by the visitor
• Form submission timestamp
• No behavioral data, page views, or browsing history is collected

Mailjet's web-side data collection is entirely user-initiated — the visitor actively submits their information through the form. No passive data collection occurs.

Consent & Compliance

Mailjet falls under the marketing consent category because the subscription forms collect personal data (email addresses) for the explicit purpose of sending marketing communications. Under GDPR, the collection of email addresses for marketing requires consent, and Mailjet's double opt-in feature supports compliance with this requirement.

Under the ePrivacy Directive, the minimal session cookies for form state management may qualify as strictly necessary for the form functionality. However, the purpose of the form — building marketing mailing lists — means consent for the data processing is required regardless of the cookie classification.

Under CCPA/CPRA, email collection for marketing should be disclosed in the privacy policy, and visitors should be informed about how their email will be used.

Should You Block This Without Consent?

Yes. Although Mailjet's technical footprint is minimal, its purpose is marketing — collecting email addresses for mailing list subscriptions. The form itself is the data collection mechanism, and loading it implies readiness to process personal data for marketing communications. Under GDPR, the marketing purpose requires consent. Blocking the form until consent is granted ensures compliance with both cookie and data processing consent requirements.