temporarily_blocked: the check was greylisted

unknown reason: temporarily_blocked

The mail server greylisted the check: it asked to try again later.

What it means

Greylisting is an anti-spam technique: the first time a server sees a new sender, it answers "try again later" (an SMTP 4xx code). Real mail servers come back and are accepted; many spam tools never do.

The answer says nothing about the mailbox itself, so the result is unknown.

Why it happens

• Greylisting on the receiving server.
• Temporary rate limiting by the receiving server.

What to do

• Verify the address again after some time (from several minutes to a few hours). Greylisting usually lets the second attempt through.
• Do not retry immediately: the server only lets the check through after its waiting period.

Example API response

{
    "email": "jane.doe@example.com",
    "result": "unknown",
    "reason": "temporarily_blocked",
    "disposable": false,
    "accept_all": false,
    "role": false,
    "free": false,
    "user": "jane.doe",
    "domain": "example.com",
    "mx_record": "mx1.example.com",
    "mx_domain": "example.com",
    "safe_to_send": false,
    "did_you_mean": "",
    "success": true,
    "message": "Processing time: 812 ms",
    "http_code": "200"
}

Try it without an account: the API has a free sandbox key, eev_sandbox_key, that returns fixed answers for test addresses such as valid@, invalid@, unknown@ and catchall@sandbox.easyemailverification.com.

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