The total number of contacts you attempted to send to.
The number of emails that were rejected by receiving servers.
0%Delivery Rate
Total Sent:0
Total Bounced:0
Successfully Delivered:0
Bounce Rate:0%
function calculateDeliveryRate() {
// Get input values
var sentInput = document.getElementById('emailsSent');
var bouncedInput = document.getElementById('totalBounces');
var sent = parseInt(sentInput.value);
var bounced = parseInt(bouncedInput.value);
// Validation logic
if (isNaN(sent) || sent <= 0) {
alert("Please enter a valid number greater than 0 for Total Emails Sent.");
return;
}
if (isNaN(bounced) || bounced sent) {
alert("Bounced emails cannot exceed the total emails sent.");
return;
}
// Calculations
var delivered = sent – bounced;
var deliveryRate = (delivered / sent) * 100;
var bounceRate = (bounced / sent) * 100;
// Display Results
document.getElementById('resultOutput').style.display = 'block';
document.getElementById('deliveryRateDisplay').innerText = deliveryRate.toFixed(2) + '%';
document.getElementById('resSent').innerText = sent.toLocaleString();
document.getElementById('resBounced').innerText = bounced.toLocaleString();
document.getElementById('resDelivered').innerText = delivered.toLocaleString();
document.getElementById('resBounceRate').innerText = bounceRate.toFixed(2) + '%';
// Status Logic
var statusMsg = document.getElementById('statusMessage');
statusMsg.className = 'status-indicator'; // reset classes
if (deliveryRate >= 95) {
statusMsg.innerText = "Excellent Delivery Rate";
statusMsg.classList.add('status-good');
} else if (deliveryRate >= 85) {
statusMsg.innerText = "Average Delivery Rate (Needs Improvement)";
statusMsg.classList.add('status-warning');
} else {
statusMsg.innerText = "Poor Delivery Rate (Critical Issues)";
statusMsg.classList.add('status-danger');
}
}
Understanding Your Email Delivery Rate
In the world of email marketing, metrics are the compass that guides your strategy. Among the most critical of these metrics is the Email Delivery Rate. Unlike open rates or click-through rates which measure engagement, the delivery rate measures the fundamental health of your email infrastructure and list hygiene. It answers the simple question: "Did my email actually reach the recipient's server?"
The Formula:
((Total Emails Sent – Total Bounced) / Total Emails Sent) × 100 = Delivery Rate %
Delivery vs. Deliverability: The Crucial Difference
Many marketers use the terms "Delivery" and "Deliverability" interchangeably, but they refer to two distinct concepts in the email ecosystem.
Delivery Rate (This Calculator): This measures whether the receiving server accepted your email. It is purely mathematical. If you send 100 emails and 98 are accepted by the server (even if they go to Spam), your Delivery Rate is 98%.
Deliverability (Inbox Placement): This measures where that email landed after it was accepted. Did it land in the Primary Inbox, or did it get filtered into the Spam/Junk folder? A high delivery rate does not guarantee high deliverability.
Industry Benchmarks: What is a Good Score?
While benchmarks vary by industry (B2B vs B2C), maintaining a high delivery rate is universally important for sender reputation.
99%+: Excellent. Your list is clean, and your sender reputation is solid.
95% – 98%: Good/Average. This is standard for most businesses, but regular list cleaning is recommended.
Below 95%: Poor. You may have issues with invalid email addresses, spam traps, or a blacklisted IP address. Immediate action is required to prevent your domain from being blocked entirely.
Why is My Delivery Rate Low?
If the calculator above shows a rate below 95%, one of the following factors is likely the culprit:
1. Hard Bounces
A hard bounce occurs when you send an email to an address that does not exist. This happens often with old lists where employees have changed jobs or users have abandoned old free email accounts. Repeatedly sending to hard bounces damages your sender reputation.
2. Soft Bounces
Soft bounces are temporary failures. The email address is valid, but the recipient's mailbox might be full, or their server might be temporarily down. While less critical than hard bounces, too many soft bounces can still impact your rate.
3. Spam Filters
Aggressive spam filters on the recipient's side might reject your email outright if your IP address has a poor reputation or if your email content triggers specific security protocols (like missing SPF or DKIM records).
How to Improve Your Delivery Rate
improving your metrics requires a focus on List Hygiene.
Use Double Opt-In: Ensure that every email on your list belongs to a real person who wants to be there by requiring them to confirm their subscription.
Clean Your List Regularly: Remove subscribers who haven't opened an email in 6 months. Remove all hard bounces immediately.
Authenticate Your Domain: Set up SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC records. These prove to receiving servers that you are who you say you are.
Monitor Blacklists: Use tools to check if your sending IP is on any major blacklists (like Spamhaus).
Using this Email Delivery Rate Calculator regularly helps you keep a pulse on your campaign's technical health, ensuring your marketing messages have the best chance of being seen.