Maintaining a high deliverability rate is all about trust. Inbox providers like Gmail and Outlook monitor how much mail you send and how quickly you scale. If you suddenly spike your volume, you look like a spammer.
Follow these guidelines to keep your Send Onyx account healthy and your emails in the primary inbox.
1. The Importance of “Warming Up”
If you are using a new sending server (SMTP) or a new domain, you must start small. You need to “warm up” your IP address so that providers recognize you as a legitimate sender.
- Day 1-3: Send to your most engaged audience only (those who opened in the last 30 days).
- Limit: Start with no more than 50-100 emails per day.
- Scaling: Increase your volume by roughly 20% each day, provided your open rates stay high.
2. Daily Volume Limits
Once your domain is warm, you can scale to higher volumes, but you should still follow these “Safe Zones” based on your list quality:
- High Quality (Opt-in): You can scale up to 50,000+ emails per day per sending server.
- Older Lists (Re-engagement): Keep it under 5,000 per day to avoid a sudden wave of bounces.
3. Monitoring Your Signals
Your “Safe Volume” isn’t just a number; it’s a reaction to your stats. You should slow down your volume if you see:
- Bounce Rate > 3%: Stop sending and clean your list.
- Spam Rate > 0.1%: Your content or frequency is bothering people.
- Open Rate < 10%: You are likely hitting the “Promotions” tab or Spam folder.
Summary
Safe sending is a marathon, not a sprint. By following a consistent schedule and monitoring your engagement metrics in the Onyx Dashboard, you ensure that your messages always reach the inbox.