An email bounce is when an email you send fails to reach the recipient and gets returned undelivered. Instead of landing in the inbox, it “bounces back,” usually with a reason attached. Bounces are a normal part of sending email, but a high bounce rate is a warning sign worth watching.
How does an Email Bounce work?
Bounces come in two main types. A hard bounce is a permanent failure , the address doesn’t exist, the domain is invalid, or the recipient’s server has blocked you outright. These addresses should be removed and never emailed again. A soft bounce is a temporary problem , the mailbox is full, the server is down, or the message is too large , and these can succeed on a later retry. When an email bounces, the receiving mail server sends back a notification (with a code and reason), and a good email platform records it against the message so you can act on it.
How Onextel helps with Email Bounce
Onextel’s email service captures and reports bounces, distinguishing hard from soft failures so businesses can keep their sending lists clean. Hard-bounced addresses can be suppressed automatically to protect sender reputation, while bounce data feeds back through the platform alongside your other delivery reporting , giving one view of what’s landing across email, SMS, and beyond.
Why it matters
Bounces aren’t just failed messages , they hurt your sender reputation, and a bad reputation means even your good emails start landing in spam or getting blocked. Managing bounces keeps your lists healthy, your deliverability high, and your emails actually reaching real inboxes. Ignore them and the problem compounds; handle them and your whole email program stays reliable.