If the email address doesn’t exist, we should not attempt to send to it again. Thanks Gmail, that’s actually quite helpful. Please try double-checking the recipient's email address for typos or unnecessary spaces. Here’s an email bounce code example: smtp 550 5.1.1 The email account that you tried to reach does not exist.
What’s handy about these SMTP responses is that they don’t just tell you there was a problem, but they also give you more detailed (and in some cases really helpful) information on why exactly your email delivery failed. Every response code consists of a numerical bounce code along with a description that provides more info on how the mail server uses that SMTP code. We’ll go into more detail on those different kinds of bounces in a moment. But if the receiving server couldn’t complete the delivery, it will respond with an error code.īounce error codes generally start with the number 4.X.X for temporary failures (soft bounces) and 5.X.X for permanent errors (hard bounces). For example, an SMTP response code 250 means the message was accepted and the delivery action was complete. What’s an email bounce code? #Įach time an email is sent using SMTP, the receiving server will respond with an SMTP code. And just like the post carrier uses stickers and stamps to categorize what went wrong with your letter, a mailserver may reject your email with a diagnostic bounce code. Picture an email bounce as the digital equivalent of this scenario. Have you ever mailed a package or a letter, but it got returned to you a couple of days later-maybe it even included a sticker that provided more information on why your item wasn’t delivered? It might be that the address didn’t exist, you didn’t include sufficient postage, or the recipient refused to accept the package. What happens to our digital messages isn’t too dissimilar from what happens when post carriers handle mail in the real world. When an email bounces, it didn’t make it to the recipient’s inbox-but instead, the mailbox provider returned it to the sender.
In this ultimate guide to email bounces, we’ll get you answers. Instead, you’re receiving a note from the mailbox provider telling you that your email bounced.īut what exactly is a bounce and why does it happen? And what can you do when you’re seeing a bunch of your emails bouncing? Sometimes you’re trying to get an email delivered to a recipient-but it never makes it to their inbox.
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