Close is a CRM built for inside sales teams (SDRs, AEs, sales-led SaaS) with native cold email Sequences alongside call, SMS, and pipeline management. The Sequences product handles cold outreach unsubscribes via the {{unsubscribe_link}} merge variable placed manually in the email body, plus automatic reply-based opt-out detection. Close tracks opt-outs at the Lead level (not per Sequence), respected across all Sequences and manual sends in the workspace. RFC 8058 headers depend on the connected mailbox authentication. This guide covers the tag, the Lead-scope model, and how to verify the setup end to end.
Close.com unsubscribe link
| Tag syntax | {{unsubscribe_link}} |
| Placement | Manual placement in the email body |
| Scope | Lead-level opt-out across all Sequences and manual sends |
| Config path | Settings > Sequences > Unsubscribe management |
| RFC 8058 one-click | Depends on connected Google Workspace or Microsoft 365 mailbox authentication |
How to add the unsubscribe tag in Close.com
Place the merge tag exactly as shown below in the email template. Close.com replaces it at send time with a signed URL scoped to the recipient and campaign.
{{unsubscribe_link}}For custom HTML templates, wrap the tag in an anchor to render a proper hyperlink in the delivered email:
<a href="{{unsubscribe_link}}">Unsubscribe from this list</a>Manual placement in the email body
Depends on connected Google Workspace or Microsoft 365 mailbox authentication 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.
Close respects the opt-out flag on the Lead record across all Sequences and manual 1-to-1 sends, which surprises reps who expect Sequence-level opt-out. If a lead opts out from a marketing Sequence, follow-up manual outreach from the same rep is also blocked. Use separate Close workspaces for cold outreach and post-sale customer success if you need to segregate opt-out scopes.
Testing your Close.com unsubscribe link
- Send a test message to a controlled Gmail address you own via the Close.com 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 Close cold email unsubscribe link (step by step)
Close cold email Sequences require manual placement of the unsubscribe tag in the email body since Sequences target cold prospects where footer placement triggers spam filters.
- Open your Sequence step in Close under Settings > Sequences.
- Edit the message body where the unsubscribe link should appear (typically the P.S. line).
- Insert the merge variable
{{unsubscribe_link}}. Close replaces it at send time with a signed URL scoped to the Lead record. - Wrap in an anchor with a natural label:
P.S. Not the right time? <a href="{{unsubscribe_link}}">Let me know</a> and I will stop reaching out. - Enable Auto Unsubscribe reply detection under Settings > Sequences > Unsubscribe management to catch opt-out intent in replies.
- Send a test to a seed address and verify the rendered link routes to the Close-hosted opt-out confirmation page.
Lead-level opt-out and Sequence enforcement
Close respects the opt-out flag on the Lead record across all Sequences AND manual 1-to-1 sends by the assigned rep. If a Lead opts out from a cold Sequence, follow-up manual outreach from the same rep is also blocked. This is stricter than Lemlist or Outreach.io Sequence-level opt-out, but matches enterprise compliance expectations. Use separate Close workspaces for cold outreach vs. post-sale customer success if you need to segregate opt-out scopes between prospecting and account management.
RFC 8058 and mailbox authentication
Close cold email Sequences send from personal Gmail Workspace or Microsoft 365 mailboxes connected to the user account. RFC 8058 List-Unsubscribe and List-Unsubscribe-Post headers inject when the connected mailbox has SPF, DKIM, and DMARC aligned. Personal Gmail accounts without workspace authentication do not qualify for one-click compliance. For high-volume outbound (over 5,000 sends per day per domain), configure DMARC alignment on the sending subdomain to maintain Gmail one-click badge visibility.
CRM integration and pipeline sync
Close is a full CRM (not just a cold outreach tool), so opt-out events update the Lead record and cascade to pipeline reports and forecasting. A Lead flagged as Unsubscribed remains in the pipeline for closed-lost reporting but is blocked from further email outreach. Native integrations with HubSpot, Salesforce, and other CRMs are less critical since Close is often the primary CRM; teams using Close as a top-of-funnel tool alongside Salesforce should audit opt-out sync between the two systems weekly.
Frequently Asked Questions
What is the Close cold email unsubscribe tag?
The tag is {{unsubscribe_link}}. Close replaces it at send time with a signed URL scoped to the Lead record. Use it inside an anchor: <a href="{{unsubscribe_link}}">Unsubscribe</a>, typically placed in the P.S. of the email body.
Does an opt-out block manual 1-to-1 outreach too?
Yes. Close applies the opt-out flag at the Lead record level, blocking both Sequences and manual sends by the assigned rep. This is stricter than Lemlist or Outreach.io Sequence-level opt-out but matches enterprise compliance expectations.
Does Close support one-click unsubscribe for Gmail and Yahoo?
Only when the connected mailbox is properly authenticated. Close injects List-Unsubscribe and List-Unsubscribe-Post headers when the connected Gmail Workspace or Microsoft 365 mailbox has SPF, DKIM, and DMARC aligned. Personal Gmail accounts do not qualify.
Can I segregate opt-out scopes between cold outreach and customer success?
Not within a single Close workspace. The Lead-level opt-out applies across all Sequences and manual sends. Use separate Close workspaces for cold outreach (prospecting) and post-sale customer success if you need distinct opt-out pools per program.
Does Auto Unsubscribe catch multi-language opt-outs?
Only when the multilingual reply parser is enabled under Settings > Sequences > Unsubscribe management. Default English keyword matching misses opt-out expressions in French, Spanish, German, and other languages.
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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