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    Qmail Plesk 12 "550 5.7.1 Sorry, message looks like spam or phish to me (OP)"

    Hi! I have a problem I can't find a solution for. I don't even have a clue where to look further. I have an Ubuntu-Webserver with Plesk 12.0.18 installed on. Qmail installed. No Postfix. When I try to send a mail to a specific address, I get back a failure notice with the following content...
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