Email Bounce Rate: How to Keep It Under 2% with PostMTA

Keeping Your Email Bounce Rate Under 2% with PostMTA

A bounce rate above 2% damages your sender reputation and lands you in spam folders. Here's how to fix it.

Hard Bounces vs Soft Bounces

Hard bounces: Invalid email addresses — permanently undeliverable. PostMTA suppresses these automatically within hours.

Soft bounces: Temporary failures (mailbox full, server down). PostMTA retries 72 hours then suppresses if still failing.

PostMTA Bounce Processing Features

1. Instant suppression — Hard bounces suppressed immediately
2. Bounce classification — Identifies mailbox full vs domain no longer exists
3. Feedback loop integration — FBL from major providers (Gmail, Microsoft)
4. List hygiene scoring — Scores subscribers by engagement

Best Practices

• Verify emails at signup (API check before adding to list)
• Remove addresses that soft-bounce 3+ times
• Monitor your sender score at postmta.com/dashboard
• Use dedicated IPs for different list segments

PostMTA handles bounces automatically →