Flexmail is a Belgian email marketing platform serving BeNeLux SMBs and mid-market with drag-and-drop editor, automation flows, and integrated CRM connectors. The unsubscribe mechanism uses the {UNSUBSCRIBE_URL} merge tag auto-injected into every campaign footer, and Flexmail emits RFC 8058 headers automatically for authenticated sending domains. Consent is tracked at the contact level with GDPR double opt-in enforcement matching Belgian Data Protection Authority expectations. This guide covers the tag, the BeNeLux compliance model, and how to verify the setup end to end.
Flexmail Be unsubscribe link
| Tag syntax | {UNSUBSCRIBE_URL} |
| Placement | Auto-embedded in every campaign footer |
| Scope | Contact-level opt-out with GDPR double opt-in |
| Config path | Instellingen > Verzenderprofielen > Footer template |
| RFC 8058 one-click | Yes, automatic for authenticated sending domains |
How to add the unsubscribe tag in Flexmail Be
Place the merge tag exactly as shown below in the email template. Flexmail Be replaces it at send time with a signed URL scoped to the recipient and campaign.
{UNSUBSCRIBE_URL}For custom HTML templates, wrap the tag in an anchor to render a proper hyperlink in the delivered email:
<a href="{UNSUBSCRIBE_URL}">Unsubscribe from this list</a>Auto-embedded in every campaign footer
Yes, automatic for authenticated sending domains The recipient's mailbox provider (Gmail, Yahoo) uses the List-Unsubscribe-Post header to expose the native one-click button on the message. Requires domain authentication with DKIM and DMARC.
Flexmail Belgian GDPR compliance combined with Belgian DPA enforcement quarantines imported contact lists without documented consent until confirmed. BeNeLux senders migrating from other ESPs must provide GDPR documentation for each contact or run a re-permission campaign. Analogous to Actito (Belgian) and Selligent (Belgian founding) regulatory-first patterns. Dutch, French, and English language templates ship as first-class options for the multilingual Belgian market.
Testing your Flexmail Be unsubscribe link
- Send a test message to a controlled Gmail address you own via the Flexmail Be campaign preview action
- Click the footer unsubscribe link and confirm the opt-out on the landing page
- Check the subscriber or contact record: the status should be Unsubscribed within seconds
- Verify the RFC 8058 headers in Gmail: open the message, click three dots, then Show original. Look for
List-UnsubscribeandList-Unsubscribe-Post: List-Unsubscribe=One-Click
Want the full 222-platform reference?
See the pillar guide with the compliance landscape, the RFC 8058 deep dive, and the unsubscribe tag for every ESP: How to add an unsubscribe link: the complete 2026 guide →
How to add the Flexmail unsubscribe link (step by step)
Flexmail default templates include the unsubscribe link in the footer, but custom HTML templates require the tag inserted manually.
- Open your campaign or template in the Flexmail editor.
- Add or edit a text block in the footer where the unsubscribe link should appear.
- Insert the merge tag
{UNSUBSCRIBE_URL}. Flexmail replaces it at send time with a signed URL scoped to the contact. - Wrap it in an anchor:
<a href="{UNSUBSCRIBE_URL}">Uitschrijven</a>for Dutch,Se desabonnerfor French, orUnsubscribefor English. - Configure the sender identity under Instellingen > Verzenderprofielen.
- Send a test to a seed address and verify the rendered link routes to the Flexmail-hosted preference page.
Belgian DPA enforcement and BeNeLux compliance
Flexmail Belgian GDPR compliance combined with Belgian DPA enforcement quarantines imported contact lists without documented consent until confirmed. BeNeLux senders migrating from other ESPs must provide GDPR documentation for each contact or run a re-permission campaign. Analogous to Actito (Belgian) and Selligent (Belgian founding) regulatory-first patterns. Dutch, French, and English language templates ship as first-class options for the multilingual Belgian market covering Flanders, Wallonia, and Brussels-Capital regions.
RFC 8058 one-click headers
Flexmail added RFC 8058 one-click unsubscribe automatically ahead of the Google and Yahoo February 2024 requirements. The List-Unsubscribe and List-Unsubscribe-Post headers inject on every marketing send from domains authenticated under Instellingen > Verzenderprofielen. SPF and DKIM records must be verified. Belgian data residency defaults align with Belgian DPA data localization preferences.
Multilingual templates and market focus
Flexmail multilingual template library serves the trilingual Belgian market with Dutch, French, and English defaults. Automation flows respect the contact opt-out flag at every send step regardless of template language. Cross-border BeNeLux campaigns (Netherlands, Luxembourg, and Belgium) benefit from unified consent tracking that respects each jurisdiction s GDPR implementation nuances. Sending infrastructure prioritizes European inbox providers with local peering.
Frequently Asked Questions
What is the Flexmail unsubscribe tag?
The merge tag is {UNSUBSCRIBE_URL}. Flexmail replaces it at send time with a signed URL scoped to the contact. Use it inside an anchor: <a href="{UNSUBSCRIBE_URL}">Uitschrijven</a>.
Does Flexmail enforce Belgian GDPR?
Yes by default. Imported contact lists without documented consent are quarantined until confirmed. BeNeLux senders migrating from other ESPs must provide GDPR documentation for each contact or run a re-permission campaign.
Does Flexmail support one-click unsubscribe for Gmail and Yahoo?
Yes, automatically for authenticated domains. Flexmail injects List-Unsubscribe and List-Unsubscribe-Post headers on every marketing send from domains verified under Instellingen > Verzenderprofielen.
Does Flexmail support Dutch, French, and English templates?
Yes as first-class options. The multilingual template library serves the trilingual Belgian market covering Flanders, Wallonia, and Brussels-Capital regions with default templates and preference center copy in each language.
How does Flexmail compare to Actito for Belgian senders?
Both are Belgian-hosted ESPs with GDPR-first defaults. Flexmail focuses on SMB simplicity. Actito targets larger accounts with omnichannel and personalization features. Vendor choice depends on account size and feature depth needs.
About the Author
Alaa · LinkedIn
Email infrastructure specialist with 8+ years of hands-on experience in SMTP, deliverability, and email verification. I’ve configured and troubleshot mail systems across Postfix, Exchange, and cloud relays, managed IP reputation and warmup campaigns, and built verification pipelines processing millions of addresses. My work spans DNS authentication (SPF, DKIM, DMARC, BIMI), bounce handling, blocklist monitoring, and compliance frameworks including CAN-SPAM and GDPR. I write every article on SMTPedia to give email professionals, developers, and marketers the accurate, RFC-grounded reference they need.
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