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this mailbox was accepted too.","suggested_action":"accept_and_confirm","scope":"api"},{"code":302,"result":"catch_all","verdict":"risky","billed":true,"reason":"domain_catch_all","meaning":"A random address and this mailbox were both accepted.","suggested_action":"accept_and_confirm","scope":"api"},{"code":400,"result":"undeliverable","verdict":"undeliverable","billed":true,"reason":"no_mail_server","meaning":"The domain has no mail server: no MX and no A record, or a null MX.","suggested_action":"reject","scope":"api"},{"code":404,"result":"softbounce","verdict":"unknown","billed":false,"reason":"greylisted","meaning":"The mail server temporarily refused the mailbox (4xx), typically greylisting.","suggested_action":"accept_and_confirm","scope":"api"},{"code":405,"result":"hardbounce","verdict":"undeliverable","billed":true,"reason":"mailbox_rejected","meaning":"The mail server rejected the mailbox permanently (5xx).","suggested_action":"reject","scope":"api"},{"code":406,"result":"inbox_full","verdict":"risky","billed":true,"reason":"mailbox_full","meaning":"The mailbox is over quota (552 or enhanced status x.2.2).","suggested_action":"accept_and_confirm","scope":"api"},{"code":407,"result":"hardbounce","verdict":"undeliverable","billed":true,"reason":"dropped_at_rcpt","meaning":"The server dropped the connection when the mailbox was named.","suggested_action":"reject","scope":"api"},{"code":408,"result":"unknown","verdict":"unknown","billed":false,"reason":"no_verdict","meaning":"The dialogue ended after the greeting without a verdict.","suggested_action":"accept_and_confirm","scope":"api"},{"code":409,"result":"undeliverable","verdict":"undeliverable","billed":true,"reason":"greeting_rejected","meaning":"The server refused our greeting.","suggested_action":"reject","scope":"api"},{"code":410,"result":"undeliverable","verdict":"undeliverable","billed":true,"reason":"no_smtp_service","meaning":"No SMTP service: connection refused, unreachable, or a 5xx banner.","suggested_action":"reject","scope":"api"},{"code":411,"result":"unknown","verdict":"unknown","billed":false,"reason":"accepts_unverified","meaning":"The server accepts without verifying (252).","suggested_action":"accept_and_confirm","scope":"api"},{"code":412,"result":"unknown","verdict":"unknown","billed":false,"reason":"relay_blocked","meaning":"The server blocked our checking IP on policy (5.7.x); every relay we tried was refused.","suggested_action":"accept_and_confirm","scope":"api"},{"code":413,"result":"softbounce","verdict":"unknown","billed":false,"reason":"server_busy","meaning":"The server is shedding load (4xx greeting).","suggested_action":"accept_and_confirm","scope":"api"},{"code":414,"result":"unknown","verdict":"unknown","billed":false,"reason":"tarpit","meaning":"The server stalled after accepting the sender.","suggested_action":"accept_and_confirm","scope":"api"},{"code":415,"result":"unknown","verdict":"unknown","billed":false,"reason":"no_greeting","meaning":"No greeting for a transient reason: timeout, reset, or TLS failure.","suggested_action":"accept_and_confirm","scope":"api"},{"code":416,"result":"softbounce","verdict":"unknown","billed":false,"reason":"relay_deferred","meaning":"The server deferred our checking IP at EHLO or MAIL FROM (volume deferral, greylisting).","suggested_action":"accept_and_confirm","scope":"api"},{"code":417,"result":"hardbounce","verdict":"undeliverable","billed":true,"reason":"mailbox_gone","meaning":"The domain accepts any address, but rejected this mailbox specifically: it is gone.","suggested_action":"reject","scope":"api"},{"code":418,"result":"unknown","verdict":"unknown","billed":false,"reason":"dns_unavailable","meaning":"DNS resolution was unavailable; try again.","suggested_action":"accept_and_confirm","scope":"api"},{"code":419,"result":"unknown","verdict":"unknown","billed":false,"reason":"timeout","meaning":"The time you allowed ran out before the mail server answered.","suggested_action":"accept_and_confirm","scope":"api"},{"code":500,"result":"unknown","verdict":"unknown","billed":false,"reason":"no_relay_available","meaning":"No verification relay could be reached: a failure on our side, not a fact about the address.","suggested_action":"accept_and_confirm","scope":"api"},{"code":null,"result":"disposable","verdict":"risky","billed":true,"reason":"disposable_domain","meaning":"A mailbox on a disposable-address provider.","suggested_action":"reject","scope":"api"},{"code":null,"result":"greylisted","verdict":"unknown","billed":false,"reason":"greylisted","meaning":"The mail server asked us to come back and had not answered by the time the file was written.","suggested_action":"accept_and_confirm","scope":"file"},{"code":null,"result":"not-found","verdict":"unknown","billed":false,"reason":"not_verified","meaning":"The file was stopped before this row was verified.","suggested_action":"accept_and_confirm","scope":"file"},{"code":null,"result":"pending","verdict":"unknown","billed":false,"reason":"pending","meaning":"Not verified yet (a download taken while the file was still verifying).","suggested_action":"accept_and_confirm","scope":"file"}]}