The recipient's mailbox has no space left. Some servers return this as a temporary 452 4.2.2, others as a permanent 552.
Soft bounce · temporary
Common causes
- The recipient has not cleaned their mailbox
- The mailbox is abandoned and filling up with mail
How to fix it
- Try again later
- If it keeps bouncing for weeks, treat the address as abandoned and remove it
- Contact the person another way if the message is important
Bounce ExplainerRun the right check for your domain or paste the full bounce message for a precise explanation.
Open Bounce Explainer →Frequently asked questions
Should I remove addresses that bounce with mailbox full?
Not after one bounce. If it repeats over several campaigns, the mailbox is probably abandoned.