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Spam rejection

Message flagged as spam

The receiving system judged the message itself to look like spam and refused or filtered it. It is about content, sending patterns or reputation, not about whether the address exists.

TypeSender or policy problem
Retry?Only after you fix your setup
The addressNot the problem: look at your sending

Common causes

  • Spammy wording, all-caps subject lines or many links.
  • Mailing to people who did not ask for it, causing complaints.
  • A sudden jump in sending volume.
  • A very high bounce rate from an unclean list.

How to fix it

  1. Write for the reader: plain subject, a clear sender name and one main call to action.
  2. Send only to people who signed up and clean the list first.
  3. Include a working unsubscribe link.
  4. Ramp volume up gradually and watch your complaint rate.

Frequently asked questions

Can list cleaning help with spam filtering?

Yes, indirectly. High bounce rates tell providers you do not know your recipients. Verified lists keep the rate low.

Which results should I avoid mailing first?

Invalid and disposable addresses. Mail accept-all and unknown addresses in small batches and watch the results.

Start with free credits

Create an account, check your first addresses and see the report. No card needed.

Create free account