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 →