[exim] anti-spam pointers please

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Author: Rory Campbell-Lange
Date:  
To: exim-users
Subject: [exim] anti-spam pointers please
Hi

It's some years since I've spent time tweaking my exim setup to receive
spam. I've forgotten any skills I might once have had in this area.

I've gotten sick of getting 30+ spam emails a day and need to do something
about it! I'd be grateful for some pointers to the state-of-the-art setup.

right now relay blocks, cram_md5 rejects and spamhaus blocks account for about
500-1000 rejections a day (no wonder everyone has gone to Google mail!).

I'm running Exim 4.89-2+deb9u3 under Debian, with spamassassin/spamc 3.4.2.1

Spamd is reporting along the following lines.

    spamd: result: . 0 - BAYES_00,
                DKIMWL_WL_HIGH,
                DKIM_SIGNED,
                DKIM_VALID,
                DKIM_VALID_EF,
                FORGED_MUA_MOZILLA,
                HEADER_FROM_DIFFERENT_DOMAINS,
                MAILING_LIST_MULTI,
                SPF_PASS,
                URIBL_BLOCKED scantime=0.5,
                size=5448,
                user=mail,
                uid=8,
                required_score=3.0,
                rhost=127.0.0.1,
                raddr=127.0.0.1,
                rport=59670,
                mid=<example.mail.com>,
                bayes=0.000000,
                autolearn=disabled


Pointers much appreciated.

Rory