Doppler is a Latin American email marketing platform based in Argentina serving SMBs and mid-market brands across Spanish and Portuguese speaking markets. The unsubscribe mechanism uses the [[UNSUBSCRIBE]] merge tag auto-injected into every campaign footer, and Doppler emits RFC 8058 headers automatically once the sending domain is authenticated. Consent is tracked at the list level with a preference center option available. Multilingual support covers Spanish, Portuguese, and English with per-contact language routing. This guide covers the tag, the LATAM market focus, and how to verify the setup end to end.
Doppler unsubscribe link
| Tag syntax | [[UNSUBSCRIBE]] |
| Placement | Auto-embedded in every campaign footer |
| Scope | Per-list opt-out with preference center |
| Config path | Settings > Sender identity > Footer |
| RFC 8058 one-click | Yes, automatic once sending domain is authenticated |
How to add the unsubscribe tag in Doppler
Place the merge tag exactly as shown below in the email template. Doppler replaces it at send time with a signed URL scoped to the recipient and campaign.
[[UNSUBSCRIBE]]For custom HTML templates, wrap the tag in an anchor to render a proper hyperlink in the delivered email:
<a href="[[UNSUBSCRIBE]]">Unsubscribe from this list</a>Auto-embedded in every campaign footer
Yes, automatic once sending domain is authenticated 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.
Doppler multilingual accounts routing Spanish, Portuguese, and English content need per-language footer variants. Setting the language preference on the contact record during import routes the correct footer language automatically; missing this attribute defaults to the account language, potentially confusing recipients from other language regions.
Testing your Doppler unsubscribe link
- Send a test message to a controlled Gmail address you own via the Doppler 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
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How to add the Doppler unsubscribe link (step by step)
Doppler drag-and-drop templates include the unsubscribe link in the default footer, but custom HTML templates require the tag inserted manually.
- Open your campaign or template in the Doppler editor.
- Add or edit a text block in the footer where the unsubscribe link should appear.
- Insert the merge tag
[[UNSUBSCRIBE]]. Doppler replaces it at send time with a signed URL unique per subscriber. - Wrap it in an anchor with your preferred label:
<a href="[[UNSUBSCRIBE]]">Cancelar suscripcion</a>for Spanish,Cancelar inscricaofor Portuguese. - Add the physical postal address block. Doppler reads it from Configuracion > Identidad del remitente.
- Send a test to a seed address and verify the rendered link routes to the Doppler-hosted preference page.
LATAM multilingual accounts and language routing
Doppler multilingual accounts routing Spanish, Portuguese, and English content need per-language footer variants. Setting the language preference on the contact record during import routes the correct footer language automatically; missing this attribute defaults to the account language, potentially confusing recipients from other language regions. Multi-country LATAM senders (Argentina, Mexico, Brazil, Colombia) should classify contacts by country and language during import for consistent multilingual UX across the region.
RFC 8058 one-click headers
Doppler 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 Configuracion > Dominios de envio. SPF and DKIM records must be verified. LATAM regulatory frameworks (LGPD in Brazil, LFPDPPP in Mexico, Argentina PDPA) inform Doppler default suppression and consent handling.
Regional deliverability and IP infrastructure
Doppler operates IP infrastructure with peering to LATAM email networks (Argentine Yahoo, Terra Brazil, UOL Brazil, Prodigy Mexico), giving strong deliverability to regional inbox providers alongside global inboxes (Gmail, Outlook, Yahoo). For senders targeting predominantly Brazilian, Argentine, or Mexican recipients, this LATAM-optimized infrastructure often outperforms global ESPs on regional inbox placement. Complaint feedback from LATAM inbox providers is processed in real time and syncs to the account-wide suppression list.
Frequently Asked Questions
What is the Doppler unsubscribe tag?
The tag is [[UNSUBSCRIBE]] (double brackets). Doppler replaces it at send time with a signed URL unique per subscriber. Use it inside an anchor: <a href="[[UNSUBSCRIBE]]">Unsubscribe</a>.
Does the Doppler footer localize for LATAM markets?
Yes when the contact has a language preference set. Doppler reads the contact language attribute to route Spanish, Portuguese, or English footers automatically. Multi-country LATAM senders should classify contacts by country and language during import.
Does Doppler support one-click unsubscribe for Gmail and Yahoo?
Yes, automatically for authenticated domains. Doppler injects List-Unsubscribe and List-Unsubscribe-Post headers on every marketing send from domains verified under Configuracion > Dominios de envio.
Is Doppler LATAM-optimized for regional inbox providers?
Yes. Doppler operates IP infrastructure with peering to LATAM email networks (Terra Brazil, UOL Brazil, Prodigy Mexico), giving strong deliverability to regional inbox providers alongside global inboxes. Senders targeting predominantly LATAM recipients often see better regional inbox placement than global ESPs.
Does Doppler comply with LGPD and LATAM data protection laws?
Yes. LATAM regulatory frameworks (LGPD in Brazil, LFPDPPP in Mexico, PDPA in Argentina) inform Doppler default suppression and consent handling. Permanent suppression on opt-outs blocks API reactivation, matching regional regulatory expectations.
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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