Email List Management
Best Practices for BayEngage

Why List Health Directly Affects Inbox Placement

ISPs like Gmail and Outlook don't just look at your content when deciding where to deliver your email — they watch how recipients respond to your messages. Sending to a list full of inactive, invalid, or disengaged addresses sends the wrong signals:

• Low open rates signal that recipients don't want your email, pushing future sends toward spam
• High bounce rates indicate poor data quality, a common spam characteristic
• High complaint rates directly harm your sender reputation at Gmail and Yahoo
• Sending to spam traps can result in immediate blacklisting

A list of 100,000 engaged subscribers will consistently outperform a list of 500,000 where 70% are inactive. Smaller, cleaner list = better inbox placement = higher ROI.

Bounce Handling

A bounce means the receiving server rejected your email. There are two types, and they require different responses.

Hard Bounce Thresholds

Keep your hard bounce rate below 2%. Above that threshold, ISPs treat you as a sender with poor data hygiene — a common spammer characteristic. BayEngage tracks bounce rates per campaign; check them after every send.

Why Hard Bounces Accumulate

• Contacts who signed up years ago with addresses they've since abandoned
• Corporate email addresses from contacts who've changed jobs
• Typos at signup (e.g., @gmai.com instead of @gmail.com)
• Inactive domains where the MX records have been removed

Suppression Lists

A suppression list is a list of email addresses you should never mail — unsubscribes, hard bounces, spam complainers, and manual exclusions. Proper suppression management is both a legal requirement and a deliverability necessity.

What Belongs on Your Suppression List

• Unsubscribers — Anyone who has clicked unsubscribe from any campaign
• Hard bounces — Addresses that have permanently rejected your mail
• Spam complainers — Addresses that clicked "Report Spam" (Gmail Feedback Loop required to receive these)
• Manual exclusions — Addresses you've chosen to exclude for business reasons
• Legal requests — GDPR deletion requests, CASL opt-outs

Global vs List-Level Suppression

The key distinction: when someone unsubscribes, they should be suppressed globally — from all your campaigns and automations — not just the list they came from. BayEngage handles global suppression by default. Do not override this behavior by re-importing suppressed contacts to a different list.

Importing External Suppression Lists

If you're migrating from another platform, export your suppression list before migrating and import it into BayEngage immediately. Sending to someone who unsubscribed from your old platform is a compliance violation — and those contacts are likely to complain again.

In BayEngage: Contacts → Suppression List → Import to bulk-upload suppressed addresses.

Segmentation & Engagement Scoring

Segmentation is the practice of dividing your list into groups based on behavior, characteristics, or engagement level — and sending targeted campaigns to each group instead of blasting everyone. It's one of the highest-leverage list management practices.

Engagement Segments to Create in BayEngage

• Highly engaged (opened in last 30 days) — Your best segment. Prioritize new offers, launches, and high-value campaigns here first.
• Engaged (opened in last 90 days) — Core list. Standard campaign cadence.
• At-risk (no opens in 90–180 days) — Reduce send frequency; consider a re-engagement campaign.
• Inactive (no opens in 180+ days) — Run a win-back series; suppress non-responders.
• Never opened — Review the source. If they came from a recent import or campaign, investigate delivery issues first.

Behavioral Segments

• Purchase history — Customers vs. prospects vs. lapsed buyers
• Product category interest — Based on links clicked in past campaigns
• Signup source — Organic search vs. paid ads vs. in-store capture vs. popup
• Geographic location — Important for time-zone-based sending and regional promotions

In BayEngage, create segments via Contacts → Segments → New Segment. Use conditions based on campaign activity, contact properties, and custom fields.

Re-engagement Campaigns

A re-engagement (or "win-back") campaign is a targeted sequence sent to inactive subscribers asking them to confirm they still want to hear from you. Done well, it cleans your list, reduces complaints, and recovers some subscribers who were just tuning out.

When to Run a Re-engagement Campaign

• When a segment has had no opens or clicks in 90–180 days
• Before a major campaign you want to protect (BFCM, product launch)
• Quarterly as an ongoing hygiene practice

Re-engagement Sequence Structure

1. Email 1 — "We miss you" — Acknowledge the inactivity; offer something valuable (discount, exclusive content, preference update)
2. Email 2 (5 days later) — Last chance — "We're about to remove you from our list unless you click here to stay subscribed"
3. No response → Suppress — If they don't engage with either email, add them to your suppression list

Subject Line Ideas That Work

• "We haven't heard from you in a while..."
• "Are you still interested in [topic]?"
• "Should we say goodbye? (We hope not)"
• "Your subscription is about to expire"

After the Campaign

Suppress everyone who didn't engage. This feels counterintuitive — you're making your list smaller — but the deliverability improvement is significant. You'll mail fewer people at a lower cost, with better inbox placement, and a higher percentage of engaged subscribers.

BayEngage List Management Settings

Reviewing Bounce Reports

1. After each campaign, go to Campaigns → [Campaign] → Reports
2. Review the Bounces tab — check both hard and soft bounce counts
3. Hard bounce rate above 2%? Investigate the source of those addresses
4. BayEngage automatically suppresses hard bounces; verify they're in Contacts → Suppression List

Creating Engagement-Based Segments

1. Go to Contacts → Segments → New Segment
2. Add condition: Campaign Activity → Opened → In the last 90 days
3. Save as "Engaged — Last 90 Days"
4. Create equivalent segments for 30 days (highly engaged), 180 days (at-risk), and "never opened"

Setting Up a Re-engagement Automation

1. Go to Automations → New Workflow
2. Trigger: Contact enters segment (select your "Inactive 180 days" segment)
3. Add Email 1 — re-engagement offer
4. Wait 5 days
5. Add condition: Has the contact clicked any link?
6. If NO: Add to Suppression List
7. If YES: Remove from inactive segment, add to re-engaged segment

List Hygiene Checklist

Setup (One-Time)

• ☐ Import suppression list from previous platform before first send
• ☐ Hard bounce auto-suppression verified in BayEngage settings
• ☐ Global unsubscribe suppression enabled (not list-level only)
• ☐ Engagement segments created (30 / 90 / 180 / never-opened)

Per Campaign

• ☐ Send to engaged segments first (not entire list)
• ☐ Review bounce rate after campaign (target: under 2%)
• ☐ Review complaint rate (target: under 0.05%)
• ☐ Update engagement segments based on campaign results

Quarterly

• ☐ Run re-engagement campaign to inactive segments
• ☐ Suppress non-responders from re-engagement campaign
• ☐ Review total suppression list size growth
• ☐ Audit acquisition sources — which ones produce high bounce/complaint rates?
• ☐ Check blacklist status — free blacklist checker