Is your email bounce rate stopping your campaigns from delivering results?
If a large number of your emails never reach customers, your campaign performance is already taking a hit. Lower open rates, fewer clicks, lost conversions, and a damaged sender reputation are often the result of one overlooked metric: email bounce rate.
Email bounces occur when a message cannot be delivered to the recipient's inbox. While a few bounced emails are normal, a consistently high email bounce rate is a warning sign. It can damage your sender reputation, making it harder for future campaigns and even critical emails like OTPs, order confirmations, and shipping updates to reach customers.
To help you avoid this, we've put together this blog explaining what an email bounce rate is, why it happens, the different types of email bounces, and practical ways to reduce it so your emails consistently reach your customers' inboxes.
An email bounce happens when a message you send doesn't reach the recipient's inbox. Instead, the recipient's mail server rejects it, returns it, or is simply unable to deliver it. When this happens, your Email Service Provider (ESP) records it as an email bounce.
Simply, it happens for several reasons, such as:
But there are different types of email bounces. Let's understand each one.
There are mainly two types of email bounces: hard bounce and soft bounce. However, on some platforms, you may also come across a third type called a pending bounce. Let's understand each of them in detail.
A permanent delivery failure that occurs when an email can never be delivered to the recipient. This usually happens because the email address is invalid, the domain doesn't exist, or the mailbox has been deleted or permanently disabled. Since the issue is permanent, these email addresses should be removed from your mailing list to protect your sender reputation.
A temporary delivery failure that occurs when the recipient's email address is valid, but the message can't be delivered at that moment. This can happen because the recipient's inbox is full, there's a temporary server issue, or the email is blocked by a temporary filter. In most cases, the email can be delivered successfully once the issue is resolved.
A temporary delivery status where the email hasn't been delivered yet, but the sending platform is still trying. This usually happens when the issue appears to be temporary, such as a busy server or a temporary connection problem. If the email still can't be delivered after multiple attempts, it is eventually reclassified as either a soft bounce or a hard bounce, depending on the reason for the failure.
So, these are basically the different types of bounces that can happen while running email campaigns. But before understanding how to fix them, it is important to know why these bounces actually happen and what causes your emails to fail in the first place.
Emails bounce back because they may have an invalid email address, a full inbox, server issues, authentication problems, or something else. Identifying the actual cause of a bounce helps you take the right action instead of simply removing contacts or retrying deliveries without understanding the issue.
So, here are some of the most common reasons why email bounces happen:
A simple typo while entering an email address, customers using old email IDs they no longer access, or fake signups (especially when people enter temporary addresses to get a discount code) can quickly increase your bounce rate when you're sending emails at scale.
Sometimes, the email address is correct, but the email still fails to deliver. This can happen when the recipient's inbox is full, or their mail server is temporarily down or overloaded. These are usually soft bounces and often get resolved automatically once the issue is fixed.
If your SPF, DKIM, or DMARC records are not configured properly, email providers may reject your emails or send them directly to spam. While this sounds technical, it is one of the easier issues to fix once identified.
If your domain is blacklisted or your email content looks spammy (like excessive links, all-caps subject lines, or too many promotional triggers), mailbox providers may start filtering your emails more aggressively. The impact goes beyond one campaign and can affect your future email deliveries as well.
Problems with your sending setup, such as incorrect DNS settings, MX record errors, or a poorly configured sending domain, can prevent emails from being delivered at all. These issues are less common, but when they occur, they can impact your entire email list, making them easier to identify.
Knowing why emails bounce helps you identify the problem, but the real goal is to prevent it from happening again. Here are the fixes that can actually help reduce your email bounce rate and improve deliverability.
You can reduce your email bounce rate by maintaining a clean email list, verifying email addresses, fixing authentication issues, and monitoring your sender reputation regularly. These steps help prevent failed deliveries and improve the chances of your emails reaching customers' inboxes.
Here are the practical steps you can follow to fix your email bounce rate and improve email deliverability:
To understand things better, let's look at a real situation of hard bounce vs soft bounce. This will make it easier for you to identify the difference and know how to handle each type of bounce effectively.
Let’s say you send an email campaign, and name@company.com bounces because the account was deleted months ago. This is a hard bounce because the email address no longer exists. The right action here is simple: remove the address from your list and avoid sending future emails to it.
Now, consider the same email address bouncing because the recipient's mailbox is full or their server is temporarily unavailable. This is a soft bounce. The email address is still valid, so removing it immediately would be a mistake. Instead, you can retry the delivery later and monitor if the issue continues.
So, both need different actions, and understanding how to handle them correctly is important to reduce your email bounce rate and keep your campaigns running smoothly.
While reducing bounce rates improves email deliverability, brands also need the right tools to manage customer communication, personalize campaigns, and improve engagement at scale. And here, Convertway helps by offering an email marketing tool to your brand.
Convertway is an omnichannel marketing platform that helps D2C brands manage customer communication across Email, WhatsApp, SMS, and AI Voice Bot. As brands scale their campaigns, maintaining email deliverability, reaching the right customers, and driving consistent engagement becomes challenging.
With Convertway, brands can improve email deliverability by sending campaigns through verified domains, setting up proper authentication, managing customer segments, and using personalized email journeys. Features like ready-to-use templates, campaign analytics, and automated flows help brands reduce delivery issues and optimize every campaign.
With better deliverability and smarter targeting, brands can ensure more emails reach customer inboxes, improve engagement, and drive higher conversions. Convertway helps businesses achieve results like 98% average delivery rates, 19% read rates, and up to 1.5X more conversions through effective email marketing campaigns.
Email bounces will never be zero, and that should not be the goal. The focus should be on identifying why emails bounce, fixing the right issues, and keeping your email list healthy. This helps protect your sender reputation and ensures important emails like promotions, OTPs, and order updates reach customers.
If email deliverability issues continue, brands can also diversify their communication channels with WhatsApp and SMS. These channels provide a more reliable way to reach customers for time-sensitive updates like OTPs, order confirmations, and shipping notifications.
Convertway helps brands manage these customer interactions across Email, WhatsApp, SMS, and AI Voice Bot, making it easier to deliver the right message through the right channel and improve overall customer engagement.
FAQs:
1. What does it mean when an email bounces?
An email bounce happens when a message you send cannot reach the recipient's inbox. This can happen because the email address is invalid, the recipient's mailbox is full, there are server issues, or the email gets rejected due to authentication or reputation problems.
2. What is the difference between a hard bounce and a soft bounce?
A hard bounce is a permanent delivery failure where the email cannot be delivered, usually because the address is invalid, the domain does not exist, or the mailbox has been removed. These addresses should be removed from your list.
A soft bounce is a temporary delivery failure caused by issues like a full inbox, temporary server problems, or temporary filtering. In this case, you can retry delivery and monitor if the issue continues.
3. Should I retry bounced emails?
It depends on the type of bounce. Soft bounces can be retried because the issue may be temporary. However, repeated failures from the same email address should be monitored and removed if the problem continues. Hard bounces should not be retried because the email address is permanently invalid.
4. Can authentication issues cause bounce backs?
Yes, authentication issues can cause email bounces. If your SPF, DKIM, or DMARC records are not configured correctly, email providers may reject your emails or send them to spam. Fixing these authentication issues can improve email deliverability.
5. What causes bounced emails?
Bounced emails can happen due to multiple reasons, including invalid email addresses, outdated email lists, full inboxes, server problems, authentication issues, sender reputation problems, and DNS or MX record errors.
6. What are the email bounce types?
There are mainly two types of email bounces: hard bounce and soft bounce. Some platforms also show a third category called pending bounce, where the system continues trying to deliver the email because the issue appears temporary.
7. How do I reduce email bounce rate?
You can reduce your email bounce rate by regularly cleaning your email list, removing invalid or inactive addresses, using double opt-in, setting up SPF, DKIM, and DMARC correctly, monitoring repeated soft bounces, and maintaining a strong sender reputation. These steps help improve deliverability and ensure more emails reach customers' inboxes.
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