On 6/14/2024 10:39 AM, Thomas Barth via users wrote:
Hello,

I would like to explain a sender what he can do to create an email that is not classified as spam.

X-Spam-Status: Yes, score=6.248 tagged_above=1 required=5
 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1,
 DKIM_VALID_EF=-0.1, DMARC_PASS=-0.001, FONT_INVIS_MSGID=2.497,
 FONT_INVIS_NORDNS=1.544, HTML_FONT_TINY_NORDNS=1.514, HTML_MESSAGE=0.001,  RDNS_NONE=0.793, RELAYCOUNTRY_BAD=2, SPF_HELO_NONE=0.001, SPF_PASS=-0.001,
 T_KAM_HTML_FONT_INVALID=0.01, T_SCC_BODY_TEXT_LINE=-0.01]

I cannot find the definitions on your old site https://spamassassin.apache.org/old/tests_3_1_x.html.
FONT_INVIS_NORDNS, FONT_INVIS_MSGID, HTML_FONT_TINY_NORDNS, RDNS_NONE

Is there no current version of the test definition.

You can get the definitions directly from the rule files.  On my system, the updated rules are in /var/lib/spamassassin/3.004006/updates_spamassassin_org.

describe  RDNS_NONE   Delivered to internal network by a host with no rDNS
describe  FONT_INVIS_MSGID   Invisible text + suspicious message ID
describe  FONT_INVIS_NORDNS   Invisible text + no rDNS
describe  HTML_FONT_TINY_NORDNS   Font too small to read, no rDNS

Since those make up the majority of the score, it looks like you should explain to the sender that they should not be using tiny or invisible fonts in their emails, and that they should fix the reverse DNS for their mailserver.

--
Bowie

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