Course Creator Email Deliverability Guide

The Course Creator Email Problem

Online course businesses depend on email more than almost any other business model. Your entire funnel runs on it:

• Lead magnet delivery
• Nurture sequences
• Launch campaigns (the revenue event)
• Enrollment confirmations
• Lesson delivery and drip content
• Re-engagement for future cohorts

If any of these hit spam, you lose revenue directly. And course creators have specific deliverability patterns that generic advice doesn't cover.

Platform Authentication

Most course platforms (Teachable, Kajabi, Thinkific) send email on your behalf. Without domain authentication, those emails are sent from the platform's domain — not yours.

Authenticate your domain on every platform:

Platform	Authentication Available	Where to Configure
Kajabi	SPF, DKIM, custom sending domain	Settings → Email
Teachable	DKIM via custom domain	Settings → Domains
Thinkific	Custom email domain with DKIM	Settings → Email
Podia	Limited (uses shared sending)	Settings → Emails

If your platform doesn't support custom sending domain authentication, use it only for in-platform notifications and handle all marketing email through a dedicated ESP.

Practitioner note: Kajabi's default email deliverability is decent, but it drops significantly during launches when all Kajabi creators are blasting simultaneously. Authenticating your domain separates your reputation from the shared pool.

The Launch Volume Problem

Course launches create extreme volume spikes. You might send 500 emails/week during content phases, then 50,000 during a 5-day launch window. This pattern triggers every spam filter red flag:

• Sudden volume increase
• High send frequency (multiple emails per day)
• Sending to the full list including unengaged subscribers
• Promotional content with urgency signals

The Fix: Pre-Launch Warmup

Start warming up 3-4 weeks before launch:

• Week 1: Send to top 10% most engaged subscribers
• Week 2: Expand to top 25%
• Week 3: Expand to top 50%
• Launch week: Full list, with volume ramped from your pre-launch baseline

This builds sending velocity gradually so mailbox providers don't see a sudden spike from an otherwise low-volume sender. For more on volume ramping, see our email warmup guide.

Separating Email Streams

Use two sending systems:

Course platform (transactional):

• Enrollment confirmations
• Lesson delivery notifications
• Certificate delivery
• Password resets

Dedicated ESP (marketing):

• Launch sequences
• Nurture content
• Promotional campaigns
• Re-engagement campaigns

This prevents marketing spam complaints from affecting your course delivery emails.

Practitioner note: A course creator I work with had enrollment confirmation emails going to spam during a launch because their marketing blast to 40,000 subscribers tanked their shared sending reputation. Separating streams fixed it immediately for the next cohort.

List Hygiene Between Launches

Course creator lists decay fast between launches. People sign up for a lead magnet, lose interest, and forget about you. By the next launch (3-6 months later), a significant portion of your list is dead weight.

Before every launch:

1. Remove hard bounces from the last send
2. Segment by engagement (opened or clicked in last 90 days)
3. Run a re-engagement campaign to the inactive segment
4. Remove non-responders from the launch list

Sending launch emails to a decayed list is the #1 deliverability killer for course creators.

Engagement Decay Between Cohorts

Keep your list warm between launches with valuable content:

• Weekly or biweekly content emails
• Mini-trainings or free resources
• Community updates
• Behind-the-scenes content

Consistent sending prevents the "cold list" problem where mailbox providers forget your sending patterns and treat your launch like unsolicited email.

If you're launching a course and want to make sure your emails land, book a pre-launch deliverability audit.

Sources

• Google: Email Sender Guidelines
• ConvertKit: Email Deliverability Best Practices
• Kajabi: Email Domain Authentication
• Teachable: Custom Domain Setup

---

v1.0 · April 2026