Live Email Testing Tools

Test your emails in real inboxes, analyze bounces, and scan content security before launching campaigns to thousands of recipients.

Seed List Testing

Send test emails to real mailboxes across Gmail, Outlook, Yahoo, Apple Mail, and more. See exactly where your emails land: inbox, spam, promotions, or updates tab.

Seed List Coverage

  • Gmail - Inbox, Promotions, Spam placement
  • Outlook/Office 365 - Focused, Other, Junk folder
  • Yahoo Mail - Inbox vs Spam detection
  • Apple Mail - Desktop and mobile clients
  • AOL - Legacy provider testing
  • Plus regional providers (GMX, Mail.ru, Yandex)

What You'll Learn

Get detailed inbox placement rates by provider. See which elements trigger spam filters (subject lines, content, images). Test authentication and sender reputation impact. Preview how emails render across different clients and devices.

Bounce Message Analyzer

Parse and analyze bounce messages to identify delivery failures. Categorize bounces as hard vs soft, extract DSN codes, and get actionable remediation steps.

Bounce Classification

  • Hard Bounces (5.x.x) - Permanent failures, invalid addresses
  • Soft Bounces (4.x.x) - Temporary issues, retry candidates
  • Block Bounces - Spam filtering or policy rejections
  • DSN Code Analysis - Decode status codes (5.1.1, 5.7.1, etc.)
  • VERP Parsing - Extract recipient from encoded return-path

Automated Remediation

Get specific recommendations for each bounce type. Hard bounces suggest immediate list removal. Soft bounces show retry schedules. Block bounces identify authentication or reputation issues requiring sender-level fixes.

Content Security Scanner

Scan email HTML for phishing indicators, malicious links, suspicious patterns, and content that triggers spam filters. Ensure your emails are safe and deliverable.

Security Checks

  • Link Validation - Check all URLs for broken links and redirects
  • Malware Scanning - Detect malicious attachments and scripts
  • Phishing Detection - Identify spoofing attempts and fake domains
  • HTML/CSS Validation - Ensure proper email rendering
  • Spam Trigger Words - Flag content likely to fail filters

Rendering & Compatibility

Validate HTML structure, check CSS support across email clients, test responsive design, verify image dimensions and alt text. Identify elements that break in Outlook, Gmail, or mobile clients.

Pre-Send Testing Workflow

1. Scan Content Security

Before sending, scan your email HTML for broken links, malicious patterns, and spam triggers. Fix any validation errors, ensure proper HTML/CSS structure, and verify images load correctly.

2. Run Seed Tests

Send to your seed list covering all major providers. Wait 15-30 minutes for delivery. Check inbox placement rates. If spam rate exceeds 10%, identify and fix the root cause before mailing your full list.

3. Monitor Initial Bounces

Send a small test batch (1-5% of list). Analyze bounce patterns. High bounce rates (>5%) indicate list quality issues. Parse DSN codes to identify the problem: authentication failures, reputation blocks, or technical errors.

4. Full Campaign Launch

Once seed tests show good inbox placement and bounces are minimal, send to your full list. Continue monitoring bounces and engagement. Track placement rate changes over the campaign lifecycle.

Email Testing Best Practices

Test Every Campaign

Run seed tests for every campaign, even if content is similar to previous sends. Provider algorithms change constantly.

Maintain Fresh Seed Lists

Rotate seed addresses quarterly. Use both new and aged accounts. Include mobile and desktop clients.

Track Bounce Trends

Monitor bounce rates over time. Sudden spikes indicate authentication or reputation issues requiring immediate attention.

Document Test Results

Keep records of seed test results, bounce rates, and content changes. Use this data to improve future campaigns.