SMTP Settings
Server:smtp.mail.yahoo.com
Port:587
Security:TLS
IMAP Settings
Server:imap.mail.yahoo.com
Port:993
Security:SSL
Rate Limits
Per Day500 emails
Yahoo limits vary by account age and reputation. New accounts have stricter limits.
Authentication Requirements
- SPF required
- DKIM required for bulk senders
- DMARC required (as of Feb 2024)
- One-click unsubscribe header required
- List-Unsubscribe-Post header required
Deliverability Tips for Yahoo Mail
- 1Implement DMARC with at least p=none to start
- 2Register for Yahoo's Complaint Feedback Loop
- 3Use consistent From addresses
- 4Avoid sudden volume spikes
- 5Include clear unsubscribe options
- 6Monitor bounce rates closely
Common Issues & Solutions
Deferred delivery (421 errors)
Yahoo uses aggressive rate limiting. Implement proper retry logic with exponential backoff.
Blocked sender
Check Yahoo Postmaster for reputation data and follow their remediation process.
Authentication failures
Verify SPF and DKIM are properly configured. Yahoo strictly enforces DMARC.
Quick Reference
- Provider
- Yahoo Mail
- Market Share
- ~5% of global email
- SMTP Port
- 587
- Security
- TLS