Email Bounce Rate

Email bounce rate measures the percentage of emails that couldn't be delivered to recipients. Bounces occur for various reasons and negatively impact sender reputation if not managed properly.

Types of Bounces

There are two types

• Hard bounces: Permanent delivery failures (invalid email addresses, non-existent domains, blocked addresses). These should be immediately removed from your list.
• Soft bounces: Temporary delivery issues (full inbox, server problems, message too large). These may deliver on retry but should be removed if bouncing repeatedly.

Why Bounce Rate Matters

High bounce rates

• Damage sender reputation
• Reduce email deliverability
• Indicate poor list hygiene
• Waste marketing resources
• Signal to email providers that you might be spamming

Acceptable Benchmarks

Healthy email lists maintain bounce rates below 2%. Rates above 5% indicate serious list quality issues. Financial advisors must maintain particularly clean lists because compliance requirements demand accurate record-keeping and high bounce rates suggest poor data management.

Reducing Bounce Rate

Maintain low bounce rates by

• Using double opt-in for new subscribers
• Removing hard bounces immediately
• Regularly cleaning your list
• Never purchasing email lists
• Validating email addresses at collection
• Monitoring bounce reasons
• Removing inactive subscribers periodically

Examples

• A financial planner reducing bounce rate from 6.2% to 1.3% by implementing double opt-in and immediately removing all hard bounces, improving deliverability
• An RIA discovering high bounce rates from a purchased list, removing all purchased addresses, and rebuilding with organic subscribers only
• A wealth manager using email validation at the point of collection to prevent invalid addresses from entering their system