Poppulo (formerly NewsWeaver) is an Irish internal communications platform serving global enterprises for employee communications, HR announcements, and workplace engagement. The unsubscribe mechanism differs from external marketing platforms: internal comms are typically mandatory business communications, but Poppulo still offers the {{unsubscribe}} merge tag for optional employee newsletters (wellness updates, social event announcements). RFC 8058 headers are automatic for authenticated domains. This guide covers the tag, the mandatory-vs-optional communication model, and how to verify the setup end to end.
Poppulo unsubscribe link
| Tag syntax | {{unsubscribe}} |
| Placement | Manual placement, or auto for optional newsletters |
| Scope | Per-newsletter opt-out with mandatory-communication override |
| Config path | Workspace > Newsletters > Communication settings |
| RFC 8058 one-click | Yes, automatic for authenticated sending domains |
How to add the unsubscribe tag in Poppulo
Place the merge tag exactly as shown below in the email template. Poppulo 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>Manual placement, or auto for optional newsletters
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.
Poppulo distinguishes mandatory business communications (HR policies, compliance training, executive updates) from optional newsletters (wellness, social events). Only optional newsletters accept the unsubscribe tag. Adding the tag to a mandatory business communication is silently ignored at send time; the tag renders as literal text in the delivered email.
Testing your Poppulo unsubscribe link
- Send a test message to a controlled Gmail address you own via the Poppulo 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 Poppulo unsubscribe link (step by step)
Poppulo templates for optional newsletters include the unsubscribe link in the default footer; templates for mandatory business communications ignore the tag entirely.
- Open your newsletter template in the Poppulo editor.
- Verify the newsletter is classified as Optional under Workspace > Newsletters > Communication settings. Only optional newsletters accept the unsubscribe tag.
- Add or edit a text block in the footer where the unsubscribe link should appear.
- Insert the merge tag
{{unsubscribe}}. Poppulo replaces it at send time with a signed URL unique per employee. - Wrap it in an anchor:
<a href="{{unsubscribe}}">Unsubscribe from this newsletter</a>. - Send a test to a seed address and verify the rendered link routes to the Poppulo-hosted preference page.
Mandatory vs optional communications
Poppulo distinguishes mandatory business communications (HR policies, compliance training, executive updates, legal notices) from optional newsletters (wellness, social events, employee resource groups). Only optional newsletters accept the unsubscribe tag. Adding the tag to a mandatory business communication is silently ignored at send time; the tag renders as literal text in the delivered email. This design suits enterprise employee communications where certain messages are legally or organizationally mandatory regardless of employee preference.
RFC 8058 one-click headers
Poppulo added RFC 8058 one-click unsubscribe automatically for optional newsletters sent through authenticated domains. The List-Unsubscribe and List-Unsubscribe-Post headers inject on every optional newsletter send. Mandatory business communications do not carry these headers since they are exempt from the bulk-sender requirements as internal transactional business messages, but the sending domain should still be authenticated with SPF and DKIM for general deliverability.
Preference center and per-newsletter opt-out
The Poppulo preference center exposes per-newsletter opt-out toggles to employees. An employee can leave the Wellness Newsletter while remaining subscribed to the Social Events Newsletter and the Employee Resource Group Newsletter. Mandatory communications appear in the preference center as read-only entries, showing the employee they cannot opt out of these messages but providing transparency about what messages they will receive. This is a strong compliance and trust design pattern for internal comms.
Frequently Asked Questions
What is the Poppulo unsubscribe tag?
The tag is {{unsubscribe}}. Poppulo replaces it at send time with a signed URL unique per employee, but only for newsletters classified as Optional. Mandatory business communications ignore the tag entirely.
Can employees opt out of mandatory business communications on Poppulo?
No. Mandatory business communications (HR policies, compliance training, executive updates) are exempt from unsubscribe. The tag renders as literal text if added to a mandatory template. This is intentional for internal comms where certain messages are legally required regardless of preference.
Does Poppulo support one-click unsubscribe for Gmail and Yahoo?
Yes for optional newsletters on authenticated domains. Poppulo injects List-Unsubscribe and List-Unsubscribe-Post headers on optional newsletter sends. Mandatory business communications are exempt from RFC 8058 as internal transactional messages.
Can I classify a newsletter as Mandatory retroactively?
Yes, under Workspace > Newsletters > Communication settings. Changing the classification only affects future sends; past sends retain the classification they had at send time. Employees who previously opted out of an Optional newsletter that becomes Mandatory will receive the mandatory sends going forward, since opt-out no longer applies.
Can I customize the Poppulo preference center for internal branding?
Yes. The preference center supports enterprise branding (logo, colors, corporate identity) and can be hosted under a custom subdomain via CNAME. Enterprise accounts typically configure this during onboarding to match the corporate intranet visual identity.
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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