The receiver temporarily refused the message, often as greylisting: unknown senders are asked to retry, and real mail servers get through on the next attempt.
Soft bounce · temporary
Common causes
- Greylisting of first-time senders
- Temporary policy or reputation check
How to fix it
- Usually nothing — your server retries within minutes
- Make sure your server retries from the same IP
- If it never gets through, check blacklists and authentication
Bounce ExplainerRun the right check for your domain or paste the full bounce message for a precise explanation.
Open Bounce Explainer →Frequently asked questions
Is greylisting bad for deliverability?
No. It only delays the first message from a new sender by a few minutes.