Re-Engagement Email Campaigns: A CASL Guide for Canada

Your email list has a silent problem — and it’s probably larger than you think. Not every inactive subscriber is just disengaged. In Canada, a portion of your quiet contacts may have passed the legal threshold for implied consent under CASL, meaning you could be sending commercial messages without valid permission. The good news: a well-run re-engagement email campaign fixes both issues at once.

Inactive subscribers drag down your open rates, hurt your sender reputation with Canadian ISPs, and — under Canada’s Anti-Spam Legislation — create compliance risk you may not know is there. CASL’s implied consent expires after two years from the last qualifying interaction. After that, continuing to send without re-establishing consent can mean fines of up to $10 million for organizations. That’s not a hypothetical risk for Canadian businesses with older lists.

The right approach is a structured re-engagement email campaign: segmented by recency, sequenced by intent, and designed to either win subscribers back or cleanly remove them. INBOX is built for exactly this — with segmentation tools, automation workflows, and engagement reporting that make it straightforward to identify, target, and track your inactive contacts. Here’s how to run it properly.

Most email marketers know that a cold list hurts deliverability. Low engagement signals to Gmail, Outlook, and Canadian ISPs that your emails aren’t wanted, which pushes future sends into spam or promotions folders. That’s reason enough to act. But Canadian businesses have an additional layer of exposure that US-focused email advice tends to gloss over.

The Two Consent Types Under CASL

• Express consent: The subscriber actively opted in — through a checkbox on a signup form, a written request, or a recorded verbal agreement. This type does not expire unless the subscriber revokes it.
• Implied consent: The relationship is inferred from a prior business interaction — a recent purchase, a referral, or an existing contract. This expires two years from the last qualifying business interaction, not from the date they joined your list.

If you haven’t tracked when each contact was acquired and under which consent type, you may already be sending to people whose permission has lapsed. A re-engagement campaign is both a remedy and an audit.

Before launching any re-engagement sequence, conduct a consent audit. Pull your list and categorize contacts by consent type and acquisition date. Use the INBOX reporting dashboard to filter by last engagement date, which helps surface contacts who haven’t opened or clicked in 18–24+ months. Those are your priority segment. The 2026 CASL compliance checklist on this blog is a useful companion for this process.

Not all inactive subscribers need the same message. Someone who last engaged 90 days ago is cooling off — a gentle nudge may be enough. Someone who hasn’t opened an email in 20 months is a different situation entirely. Treating both contacts with the same campaign produces mediocre results for the first group and legal risk with the second.

Three Segments Worth Building

• Cooling (60–180 days inactive): Still within a reasonable reactivation window. A single, value-focused re-engagement email is usually sufficient. No urgency needed.
• Cold (6–18 months inactive): Needs a short sequence of two to three emails, with a clear value reminder and an explicit re-opt-in request by the end of the sequence.
• Lapsed (18+ months, approaching the CASL deadline): Highest priority. These contacts need a direct re-consent ask. If they don’t respond before the two-year mark, suppress them before — not after — that date.

INBOX’s personalization and segmentation tools let you build these groups by filtering on engagement date, contact tags, and consent metadata without building manual exports. Once your segments are defined, use A/B testing to test subject line variations for each tier before committing to a full send — the cold and lapsed segments often respond to different framing than your active audience does.

The most common mistake in re-engagement emails is leading with the sender’s feelings: “We miss you!” or “It’s been a while — where have you been?” These openers feel automated and self-referential. The subscriber doesn’t care that you miss them. They care about whether staying on your list offers them anything worth the inbox space.

Elements That Work

• An honest subject line: Something direct — “Still interested in [topic]?” or “One quick question before we part ways.” Avoid promotional language here. This is a consent touchpoint, not a sales pitch.
• A specific value reminder: One or two sentences on what they signed up for and what they’ve been missing. Make it about them, not you.
• A single, clear action: One button — “Stay subscribed” or “Update my preferences.” No competing CTAs, no links to products, no secondary offers.
• A transparent opt-out acknowledgment: Tell them it’s easy to opt out, and that you’ll remove them from your list if they don’t respond by a specific date. This is good practice — and for CASL, it’s important documentation of good faith.

The goal isn’t to prevent every unsubscribe. It’s to ensure that everyone remaining on your list actually wants to be there. A list of 5,000 engaged subscribers consistently outperforms one with 20,000 indifferent ones.

You can build this entire flow inside INBOX Automation — trigger the first message based on a defined inactivity threshold, add a wait step, then automatically send a final notice to non-responders before suppressing them. No manual intervention required once the workflow is live.

For cold and lapsed segments, a single email rarely closes the loop. A short, well-paced sequence gives you multiple touchpoints without overwhelming contacts who have already tuned out. Three emails is the right length — enough to give subscribers a genuine opportunity to re-engage, but not so many that you’re becoming the thing they were ignoring in the first place.

How to Structure Each Email

• Email 1 — The check-in (Day 1): Low pressure. A direct question about whether they want to keep hearing from you. Optionally include a preview of a recent article, offer, or resource to remind them of the value they’ve been missing. Keep it short — three to four sentences plus a CTA button.
• Email 2 — The offer (Day 6–8): If there’s no action on Email 1, follow with something specific — a discount, a free resource, an invitation to update preferences. Give them a concrete reason to re-engage, not just another reminder that you exist.
• Email 3 — The final notice (Day 13–15): Be direct. Tell them this is the last email you’ll send if they don’t take action, and that they can re-subscribe any time through your signup form. This email frequently has the highest conversion rate of the three — the urgency is real and the message is easy to understand.

Keep all three emails short. These are direct communications with disengaged contacts, not newsletters. Use the INBOX drag-and-drop editor to keep the design clean and minimal — no heavy graphics, no promotional imagery. Clear text, one CTA button, nothing else competing for attention.

Once your re-engagement sequence has run, act on what it revealed. Contacts who re-engaged should move to your active segments, tagged with a new consent date and type. Contacts who didn’t respond should be suppressed — not just unsubscribed from one list, but added to a suppression record so they don’t accidentally re-enter through a future import or integration.

What Sustainable List Hygiene Looks Like

• Suppression records: Keep non-responders in a dedicated suppression group with a note on why they were suppressed and when. CASL enforcement requires that you demonstrate good-faith compliance practices, and records matter.
• Consent documentation: Log when each contact re-consented, through which mechanism (email CTA, landing page, form), and under which consent type. The CASL legal page outlines what constitutes valid consent documentation.
• Quarterly engagement reviews: Don’t wait for contacts to go fully lapsed before acting. Set a recurring check — quarterly works for most businesses — to flag contacts approaching 12 months of inactivity and move them into a lighter warming sequence before they need a full re-engagement campaign.

For a broader view of how re-engagement fits into a full Canadian email marketing strategy, the 2026 small business email marketing guide on this blog covers list management in the context of building campaigns that grow over time. When you’re ready to set up your first re-engagement workflow, INBOX pricing starts free and scales as your list does.