If you have a list you're not sure about, our team can check it for you.
Why emails bounce, and what to do about it.
A bounce is an email that came back. A few are normal. Too many, and mailbox providers start trusting your domain less. Here is what causes bounces and how to keep your list clean.
Bounce checker
Right now, the bounce checker is for Lume clients only.
Get in touch
Want our team to check your list?
Leave your email and we'll write back.
What causes bounces
Every bounce has a reason.
An email bounces when it can't be delivered. A hard bounce is permanent: the address or the domain doesn't exist. A soft bounce is temporary: the inbox is full, or the receiving server is down.
Each kind counts against you. Hard bounces hurt your sender reputation the most, and soft bounces still tell mailbox providers something is off. Above a 2% bounce rate, a domain can get flagged or land on a blocklist.
Hard bounces
The address is wrong, the domain doesn't exist, or the mailbox was closed. Sending again won't change that. Take these addresses off your list right away, because even a few can cause trouble with Gmail.
Disposable addresses
Services like Mailinator, Guerrilla Mail and 10MinuteMail hand out addresses that stop working after a short while. Anything you send later will bounce. Don't keep them on your list.
Role addresses
Addresses like info@, admin@ and support@ reach a group, not a person. They tend to draw more complaints, and some email platforms won't send to them at all.
Keeping a list clean
Check addresses when people sign up. Clean your list on a regular schedule. Honor every unsubscribe. Warm up a new domain slowly instead of sending to everyone on the first day.
When our team sends for you
After every send we check bounces, complaints and blocklists, and fix what breaks. Your list stays yours.
Bounces are one signal. Check the rest with the domain health checker and the blacklist checker.
Let our team handle the bounces.
We set up your sending domain, send from servers we run ourselves, and check every send for bounces, complaints and blocklists.