Hi

when using recipient-whitelist-file (and probably -entry) an open relay 
is created, when a filter is in effect.

Example
220 mail.example.com ESMTP
helo bischowski
250 mail.example.com
mail from:i...@non-existing-mx.com
250 ok
rcpt to:i...@local-recipient-not-whitelisted.com
421 Refused. The domain of your sender address has no mail exchanger (MX).
rcpt to:o...@whitelisted-recipient.de
250 ok
rcpt to:i...@local-recipient-not-whitelisted.com
250 ok

seems like spamdykes comes to a "250 ok" in middleman() for the 
whitelisted recipient, it sets rejection to null and all subsequent 
"rcpt to"s are not checked.

-bischowski
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