Why Monitoring Matters

• Email deliverability is dynamic — today’s good practices may not work tomorrow.
• Monitoring helps detect issues early, like rising bounce rates or spam complaints.
• Without tracking, you’re flying blind.

Key Deliverability Metrics

1. Delivery Rate – % of emails accepted by recipient servers.
2. Inbox Placement Rate (IPR) – % of emails landing in inbox vs. spam.
3. Bounce Rate – % of emails that fail to deliver (hard vs. soft bounces).
4. Open Rate – % of recipients who open your email.
5. Click-Through Rate (CTR) – % of recipients who click links.
6. Spam Complaint Rate – % of users marking your emails as spam.
7. Unsubscribe Rate – How many opt-out per campaign.

Tools for Monitoring Deliverability

• Postmaster Tools (Google, Microsoft, Yahoo) → See how ISPs view your emails.
• Dedicated Deliverability Tools: 
  •        GlockApps
  •        MailTester
  •        Postmark’s Dashboard
  •        SendForensics
• Reputation Monitoring: 
  •        Return Path Sender Score
  •        Talos Reputation Center (Cisco)
  •        Microsoft SNDS

Ongoing Monitoring Checklist

• Check bounce logs after every campaign.
• Monitor open & click rates regularly for sudden drops.
• Set up alerts for spikes in spam complaints.
• Test deliverability across providers (Gmail, Outlook, Yahoo, Apple Mail).
• Track domain & IP reputation monthly.

Turning Data Into Action

• High bounces? → Clean your list.
• Low opens? → Improve subject lines & segmentation.
• Spam complaints rising? → Check content + sending frequency.
• Poor inbox placement? → Revisit authentication (SPF/DKIM/DMARC).

🥋 Sensei Tip

“Deliverability is like a dojo belt test — you don’t pass once and forget. You must keep proving your discipline every campaign.”