I thought this had something to do with Spamassassin, so I tried adding the domain to the whitelist, but that didnt help. Disabling SA entirely does help though, it fixes the issue.
Too bad spam starts pouring in with SA disabled, so I need a better solution.
Also, I dont understand why SA would reject a mail if its only supposed to either move or delete spam.
The domain in question is brand new, not listed on any blacklists and the owners mail address is working fine otherwise. Apart from other people on my VPS being unable to mail him, that is.
Any clues would be appreciated!
Here’s the header of the latest one:
Received: from mail by mail.myserver.com with spam-scanned (Exim 4.76)
for firstname.lastname@example.org; Thu, 16 Feb 2017 13:41:05 +0100
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on mail.myserver.com
X-Spam-Status: No, score=-0.8 required=3.0 tests=ALL_TRUSTED,BAYES_00,
HTML_IMAGE_ONLY_12,HTML_MESSAGE,URIBL_BLOCKED autolearn=no version=3.3.2
Received: from ip5650dfcd.direct-adsl.nl ([188.8.131.52] helo=[192.168.2.8])
by mail.myserver.com with esmtpsa (UNKNOWN:AES128-SHA:128)
for email@example.com; Thu, 16 Feb 2017 13:41:02 +0100
From: Tom <firstname.lastname@example.org>
To: Receiver <email@example.com>
Date: Thu, 16 Feb 2017 13:41:01 +0100
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101
This is a multi-part message in MIME format.
Content-Type: text/plain; charset=utf-8; format=flowed