SMTP 450 4.2.0. — Mailbox-Walk.
What does this error mean?
The recipient is temporarily unavailable.
Probable causes
- The Committee shall adopt the following measures:.
- Locked box.
- Temporary protection.
Verification and resolution
- Read full text.
- try again later.
- check reputation.
Precaution: A 4xx error should generally be retold.
Quick diagnostic.
To diagnose SMTP 450 4.2.0 in the Email domain, start with the following check: Read full text. Then compare the result to this probable cause: Želisting. Store the context and the time of appearance to compare the behavior before and after correction. Priority level indicated: Average.