SMTP Settings
Server:smtp.gmail.com
Port:587
Security:TLS
IMAP Settings
Server:imap.gmail.com
Port:993
Security:SSL
Rate Limits
Per Day500 emails
Free Gmail accounts: 500 emails/day. Google Workspace: 2,000 emails/day. Bulk senders (5,000+/day) must meet additional requirements.
Authentication Requirements
- SPF record must pass
- DKIM signature required for bulk senders
- DMARC policy recommended (p=quarantine or p=reject)
- Valid PTR record for sending IP
- TLS encryption required
Deliverability Tips for Gmail / Google Workspace
- 1Implement SPF, DKIM, and DMARC authentication
- 2Maintain spam complaint rate below 0.1%
- 3Use Google Postmaster Tools to monitor reputation
- 4Ensure one-click unsubscribe for bulk senders
- 5Keep bounce rate under 2%
- 6Warm up new sending IPs gradually
Common Issues & Solutions
Emails going to spam folder
Check authentication records, review content for spam triggers, and monitor Postmaster Tools for reputation issues.
Rate limiting (421 errors)
Reduce sending speed, implement exponential backoff, and consider using a dedicated IP.
Blocked for spam
Review Google's bulk sender guidelines, clean your list, and request review through Postmaster Tools.
Quick Reference
- Provider
- Gmail / Google Workspace
- Market Share
- ~30% of global email
- SMTP Port
- 587
- Security
- TLS