Calculate the percentage of sent emails that successfully reach recipients. Monitor deliverability to protect sender reputation.
The Email Deliverability Rate Calculator computes the percentage of your sent emails that were successfully accepted by receiving mail servers. This is the first gate in email marketing—if your emails don't get delivered, nothing else matters.
Deliverability rate differs from inbox placement rate. A delivered email may still land in spam or promotions tabs. However, deliverability is the foundational metric that tells you whether your sending infrastructure, authentication, and list quality are working.
Most reputable email platforms achieve 95–99% deliverability rates. If your rate drops below 95%, it signals authentication issues, list quality problems, or IP reputation damage that needs immediate investigation.
Tracking this metric consistently enables marketing teams to identify campaign performance trends and reallocate budgets to the highest-performing channels before opportunities are lost. This measurement provides a critical foundation for marketing budget allocation, helping teams invest where they will achieve the greatest impact on brand awareness and revenue growth.
Monitoring deliverability rate helps you catch infrastructure and reputation issues before they escalate. A 1–2% drop might seem small, but on a 100,000-subscriber list, that's 1,000–2,000 emails not reaching people. This calculator helps you quantify the gap and track improvement over time. Data-driven tracking enables proactive campaign management, allowing teams to scale successful tactics and cut underperforming initiatives before budgets are depleted unnecessarily.
Deliverability Rate = (Emails Delivered ÷ Emails Sent) × 100
Result: 97.00%
With 48,500 out of 50,000 emails delivered, your deliverability rate is 97.00%. This is within the healthy range above 95%, indicating good sender reputation and list quality. The 1,500 undelivered emails should be investigated for bounce types.
Deliverability rate measures the percentage of emails that the receiving mail server accepted. It's calculated by dividing delivered emails by total emails sent. This metric reflects the health of your sending infrastructure and list quality.
Email authentication (SPF, DKIM, DMARC), sender reputation, list hygiene, bounce rate management, and spam complaint rates all contribute to deliverability. A weakness in any area can drag your entire rate down.
Just because an email is delivered doesn't mean it reaches the inbox. Delivered emails may go to spam, junk, or promotions folders. Track both metrics for the complete picture.
Start with proper authentication, maintain consistent sending patterns, and prioritize list hygiene. Use engagement-based segmentation to send more to active subscribers and less to dormant ones. This signals to ISPs that your emails are wanted.
A healthy deliverability rate is 95% or higher. Top senders achieve 98–99%. Rates below 90% indicate serious deliverability problems that need urgent attention.
Deliverability rate measures whether the receiving server accepted your email. Inbox placement rate measures whether the email landed in the inbox versus spam or promotions tabs. You can have 98% deliverability but only 80% inbox placement.
Common causes include poor sender reputation, missing email authentication (SPF/DKIM/DMARC), high bounce rates, spam complaints, sending to invalid addresses, and being on email blacklists. Sharing these results with team members or stakeholders promotes alignment and supports more informed decision-making across the organization.
ISPs assign a reputation score to your sending IP and domain. Low reputation leads to emails being throttled, deferred, or rejected outright. Reputation is built through consistent sending, low bounces, low complaints, and good engagement.
Shared IPs are fine for senders under 100,000 emails/month, as the ESP manages reputation. Dedicated IPs give you full control but require proper warm-up and consistent volume. Low-volume senders on dedicated IPs can actually hurt delivery.
Check deliverability after every campaign and review trends weekly. Use tools like Google Postmaster, Microsoft SNDS, and your ESP's built-in reporting to stay on top of reputation changes.
Yes. Clean your list aggressively, fix authentication records, reduce sending volume temporarily, focus on your most engaged subscribers first, and gradually rebuild volume. Recovery typically takes 2–4 weeks of consistent good sending behavior.