Eine Email erreicht mich nicht - wieso?

`CODE`	Description
`ALLOWED`	The message passed all filters. qmail may still bounce the message for other reasons, however.
`ALLOWED_AUTHENTICATED`	The remote client successfully authenticated using SMTP AUTH. If qmail is patched to provide SMTP AUTH, this code will never be used.
`ALLOWED_TLS`	The remote client successfully started a TLS session.
`DENIED_ACCESS_DENIED`	The connection was blocked because the remote server's IP address or rDNS name was found in the access file with a `deny` command.
`DENIED_AUTH_REQUIRED`	The message was blocked because the remote server has not authenticated, which is required.
`DENIED_BLACKLIST_IP`	The connection was blocked because the remote server's IP address is blacklisted.
`DENIED_BLACKLIST_NAME`	The connection was blocked because the remote server's rDNS name is blacklisted.
`DENIED_EARLYTALKER`	The connection was blocked because the remote server began sending data before the SMTP greeting was issued.
`DENIED_GRAYLISTED`	The recipient was blocked because the sender/recipient combination was graylisted. The SMTP connection continues after this error occurs.
`DENIED_IP_IN_CC_RDNS`	The connection was blocked because the remote server's IP address was found in the remote server's rDNS name and the remote server's rDNS name ends in a country code.
`DENIED_IP_IN_RDNS`	The connection was blocked because the remote server's IP address was found in the remote server's rDNS name and a prohibited keyword was found in the remote server's rDNS name.
`DENIED_OTHER`	The connection was rejected by qmail (or another downstream filter).
`DENIED_RBL_MATCH`	The connection was blocked because the remote server's IP address was found on a DNS RBL.
`DENIED_RDNS_MISSING`	The connection was blocked because the remote server has no rDNS name at all.
`DENIED_RDNS_RESOLVE`	The connection was blocked because the remote server's rDNS name does not resolve.
`DENIED_RHSBL_MATCH`	The connection was blocked because the remote server's reverse DNS name was found on a right hand-side DNS blacklist (RHSBL) OR because the sender's domain name was found on a right hand-side DNS blacklist (RHSBL).
`DENIED_RECIPIENT_BLACKLISTED`	The recipient was blocked because the recipient email address is blacklisted.
`DENIED_REJECT_ALL`	The message was blocked because all mail is being rejected.
`DENIED_RELAYING`	The recipient was blocked because the recipient's domain is not locally hosted and the remote server is not allowed to relay.
`DENIED_SENDER_BLACKLISTED`	The connection was blocked because the sender's email address is blacklisted.
`DENIED_SENDER_NO_MX`	The connection was blocked because the sender's domain has no mail exchanger, making the sender address invalid.
`DENIED_TOO_MANY_RECIPIENTS`	The recipient was blocked because the limit was reached for this connection. The SMTP connection continues after this error occurs.
`DENIED_UNQUALIFIED_RECIPIENT`	The recipient was blocked because the address had no domain name. The SMTP connection continues after this error occurs.
`DENIED_ZERO_RECIPIENTS`	The message was blocked because no valid recipients have been specified.
`FAILED_AUTH`	The remote server attempted to authenticate but the given username and/or password were incorrect.
`FAILED_TLS`	The remote client attempted to start a TLS session but SSL negotiation failed.
`TIMEOUT`	The connection timed out, either in total time or idle time. If the connection was already being blocked for another reason, the code for that error is given as `REALCODE`.
`TLS_ENCRYPTED`	The remote server has started a TLS session with qmail. spam service does not have access to the server's certificate file, so it cannot decrypt the traffic to log any information about senders or recipients.
`UNKNOWN_AUTH`	The remote server requested an authentication method spam service doesn't support. This shouldn't happen.