When figuring out how often to email your list frequency Klaviyo should determine — most people assume more emails equals more revenue. Here is a belief so widespread in email marketing that most people do not question it: more emails equals more unsubscribes. The truth is more nuanced, and understanding it is worth real money.
The finding that changes the conversation
When you manage programs for 25 brands simultaneously, patterns emerge that are invisible inside any individual business. The finding: frequency alone does not predict unsubscribe rate. Two brands can send at identical frequency with dramatically different unsubscribe rates. The variable that explains the difference is not how often — it is how relevant.
The explanation: frequency and relevance are intertwined but separate variables. The thing that drives unsubscribes is not frequency. It is the feeling of irrelevance. A relevant email, sent daily, generates fewer unsubscribes than an irrelevant email sent weekly.
The relevance principle in practice
A fitness eCommerce brand sends a marathon training campaign. Elite athletes find it highly relevant. Beginners who just bought their first pair of running shoes find it irrelevant and overwhelming. Same email. Different relevance. Different unsubscribe behavior. The fix is not sending less — it is segmenting so that each subscriber receives content relevant to where they are.
The frequency that works for most businesses
With the relevance principle understood: 1 to 2 emails per week across all communication types is the right range for most businesses. This includes campaigns and flow emails. Below one per week and you are leaving revenue on the table and allowing your sender reputation to weaken. Above three per week and you need genuinely excellent content and strong segmentation to maintain performance.
Consistency matters more than the specific number
A business that sends one email every Tuesday like clockwork builds something no unpredictable schedule can: subscriber expectations. When subscribers know when to expect your email, they look for it. When they look for it, they open it. When they open it, it signals to email providers that your email is wanted. Consistency is the foundation of deliverability and engagement simultaneously.
If you want to understand email strategy at a deeper level, Email Mastery for eCommerce covers frequency, segmentation, and lifecycle thinking in one structured course — $297 at signifystudio.com/library.
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