Gmail delivery response
Understand Gmail 552 5.2.2: Recipient mailbox full
The recipient mailbox exceeded its storage allocation Start with the complete response and the system that owns the failing step.
A representative response is:
552 5.2.2 Recipient mailbox full.
Treat this as permanent until the complete provider response and retry behavior show otherwise.
What to preserve
Keep the complete SMTP response, timestamp, recipient, sender identity, queue or message ID, and every Received hop. Provider wording can narrow the interpretation, but a numeric code alone is not a complete diagnosis.
Ownership and next action
- Identify whether the sender, DNS operator, receiving provider, or recipient controls the failing step.
- Compare the exact envelope sender, visible From domain, recipient, and final receiving host.
- Follow the current provider documentation linked above before changing configuration.
- Make one narrow, reversible correction owned by the responsible administrator.
- Send a controlled test and retain the new response as evidence.
MailFixIt scope
MailFixIt can inspect bounded public DNS configuration on relevant guide pages, but it does not promise to clear provider reputation decisions, mailbox state, credentials, message-content blocks, or historical transport failures. Use related links only for the configuration they explicitly cover.
Frequently asked questions
What does Gmail 552 5.2.2: Recipient mailbox full mean?
It is a receiver response associated with the recipient mailbox exceeded its storage allocation Use the complete wording and provider context before assigning a single cause.
Can MailFixIt prove this entire bounce from public DNS?
No. The current checker can evaluate selected public DNS configuration, but it cannot recreate recipient state, credentials, reputation, message content, or a historical provider SMTP decision.
Related email diagnostics
Primary sources: Gmail SMTP errors and codes, Google email sender guidelines.