Why has Klaviyo's email deliverability rate dropped by 15% for e-commerce customers over the past month?

Introduction

Klaviyo's 15% drop in email deliverability rate for e-commerce customers over the past month is a critical issue that demands immediate attention. This decline directly impacts our core value proposition and customer satisfaction. I'll approach this problem systematically, focusing on identifying the root cause, validating hypotheses, and developing both short-term fixes and long-term solutions.

Step 1

Clarifying Questions (3 minutes)

• Given the sudden drop, I'm wondering about recent changes. Have there been any significant updates to Klaviyo's email sending infrastructure or algorithms in the past 1-2 months?

Why it matters: Recent changes could directly correlate with the deliverability drop. Expected answer: Yes, there was a major update to our sending algorithms. Impact on approach: If yes, we'd focus on rollback options and thorough testing of the new system.

• Considering the specificity to e-commerce customers, I'm curious about segmentation. Is this drop consistent across all e-commerce customers or concentrated in specific subsets?

Why it matters: Helps narrow down potential causes and affected user groups. Expected answer: The drop is more pronounced in customers with high-volume sending. Impact on approach: If concentrated, we'd investigate characteristics of the most affected segments.

• Thinking about external factors, have there been any notable changes in email provider policies or spam detection algorithms recently?

Why it matters: External changes could explain the drop without internal issues. Expected answer: Some major email providers have updated their spam detection systems. Impact on approach: If yes, we'd need to adapt our sending strategies to new provider policies.

• Considering user behavior, has there been any significant change in the content or frequency of emails sent by our e-commerce customers?

Why it matters: Changes in email content or frequency could trigger spam filters. Expected answer: No major changes observed in customer behavior. Impact on approach: If changes are detected, we'd need to update our best practices guidelines for customers.