Spam complaints are different from bounces.
Bounces say the address was bad. Complaints say the person got the email and did not want it.
Common causes
Complaints usually rise when:
- subscribers do not recognize the sender
- signup expectations were weak
- unsubscribe is hard to find
- frequency is too high
- the list contains questionable or low-intent contacts
What helps most
- double opt-in
- clear from-name and messaging
- easier unsubscribe
- stronger segmentation
- regular list cleanup before big sends
How MailCull fits
MailCull does not prevent every complaint. But it does help remove some of the weak-address and weak-intent noise that often travels with complaint-heavy segments.
That is especially useful before promotional sends where the wrong audience mix can cause trouble.
Reduce complaint risk with better list hygiene on MailCull →