Email Frequency: How Often to Send

One of the most critical decisions in email marketing is frequency: how many emails to send and how often. Send too many and your subscribers leave. Send too few and you waste sales opportunities. This guide explores how to find the perfect balance for your WooCommerce store.

Email fatigue and unsubscribes

The problem is real: according to industry data, over 45% of unsubscribes result from receiving too many emails. It's the number one reason customers abandon a subscriber list.

What's "too many"? It depends on your audience, industry, and content type. A fast fashion customer might tolerate 4-5 emails per week. A B2B customer expects maximum 1-2 per week. The key is understanding context.

The hidden cost of unsubscribes:

• You lose contacts from your database
• Damage sender reputation (affects deliverability)
• Reduce short-term revenue by not diversifying traffic

However, the opposite problem also exists: sending too few emails means subscribers forget who you are.

Frequency by email type

Not all emails are equal. Subscriber tolerance varies by type:

Transactional emails

Order confirmation, shipping, returns, password reset, etc. Customers expect these emails. Send them whenever necessary, without frequency limits. Typical open rate: 40-50%.

Marketing emails

Promotions, new products, content. This is where frequency matters. Most ecommerce sends 1-4 marketing emails per week.

Newsletter emails

Educational content, tips, stories. Higher tolerance because they provide value. 1-2 per week is common.

Cart abandonment emails

Critical and urgent. 1-3 emails in 72 hours is effective. Users don't complain because they're useful.

Reactivation emails

Targeted at inactive users. 1 email every 2-4 weeks is sufficient.

Segmentation by engagement level

The classic mistake is sending the same frequency to everyone. With tools like Flowgration, you can segment by behavior:

Hot (highly active customers):

• Open 50%+ of your emails
• Click regularly
• Purchase frequently
• Recommended frequency: 3-5 emails/week

Warm (active customers):

• Open 25-50% of your emails
• Purchase occasionally
• Recommended frequency: 2-3 emails/week

Cold (low-activity customers):

• Open <25% of your emails
• Rarely purchase
• High unsubscribe risk
• Recommended frequency: 1 email/week or every 2 weeks

Inactive (>90 days no interaction):

• Don't open your emails
• Don't purchase
• Recommended frequency: 1 email/month + reactivation drip

This engagement-based segmentation strategy is powerful: it increases opens, clicks, and conversions while automatically reducing unsubscribes.

Frequency by business vertical

Fast fashion ecommerce

• Frequent catalog changes
• Trends shift quickly
• Recommended: 3-5 emails/week
• Example: ASOS, H&M

Electronics ecommerce

• Long product lifecycle
• Less purchase urgency
• Recommended: 1-2 emails/week

SaaS and services

• Educational content + promotions
• Recommended: 2-3 emails/week + weekly newsletter

Food/health ecommerce

• Recurring products (subscriptions)
• Customers seek trust
• Recommended: 1-2 emails/week

Marketplaces

• Huge variety of categories
• Recommended: 2-4 emails/week, segmented by category interest

Testing the right cadence

The best way to find your optimal frequency is experimentation:

1. Start conservative: 2 emails/week (e.g., Monday and Thursday)
2. Measure for 4 weeks: Open rate, click rate, unsubscribe rate, revenue
3. Increase gradually: If results are positive, test 3 emails/week
4. Wait 4 more weeks: Check metrics
5. Keep iterating: Increase or decrease based on results

Important note: A temporary spike in unsubscribes can be normal. If you go from 1 to 3 emails/week, expect a slight initial increase. But if after 4 weeks the unsubscribe rate stabilizes and revenue rises, it was the right decision.

Monitoring deliverability

Frequency also impacts your sender reputation. If you send many emails to inactive people, email providers (Gmail, Outlook) notice:

• Low open rate
• High spam report rate
• Many unsubscribes

This reduces your "sender score" and your emails can end up in spam even for subscribers who want them.

Best practices:

• Never send to users inactive >6 months without prior segmentation
• Implement reactivation campaigns every 90 days
• Clean your list of bounces (invalid addresses) regularly
• Use SPF/DKIM authentication on your domain

With Flowgration integrated into WooCommerce, these list hygiene tasks are automatic.

Key metrics to monitor

When testing frequencies, focus on these metrics:

Timing and days to send

Beyond frequency, when you send matters:

Best days: Tuesday, Wednesday, and Thursday typically have higher open rates than Monday (people overwhelmed) and Friday (people disconnect).

Best times:

• 10:00 AM (early morning, people check email)
• 1-2 PM (after lunch)
• 7-8 PM (evening, users check mobile)

But your audience may differ. Use A/B testing to find your optimal times.

FAQ

Can I increase frequency without losing subscribers? Yes. If you increase gradually (1-2 extra emails per month) and content stays valuable, many stay. What matters is maintaining relevance.

Is one great email better than three mediocre ones? One great email always wins. Quality over quantity. If you don't have enough content, reduce frequency instead.

Does device type (mobile vs desktop) affect frequency? Not directly, but it affects design. Mobile users open emails more frequently but in shorter windows. Ensure mobile-first design.

What frequency maximizes ROI? Between 2-4 emails/week for most ecommerce, but depends on your vertical. Measure and adjust.

Finding your optimal frequency is a continuous journey. What works today may need adjustments in 6 months. Use automation tools like Flowgration to segment by engagement and optimize frequency automatically. The result: more revenue, fewer unsubscribes.

Ready to optimize your email strategy? Visit Flowgration and set up engagement-based segmentation today.