rspamd/conf/scores.d/headers_group.conf

# Headers rules scores
#
# Please don't modify this file as your changes might be overwritten with
# the next update.
#
# You can modify '$LOCAL_CONFDIR/rspamd.conf.local.override' to redefine
# parameters defined on the top level
#
# You can modify '$LOCAL_CONFDIR/rspamd.conf.local' to add
# parameters defined on the top level
#
# For specific modules or configuration you can also modify
# '$LOCAL_CONFDIR/local.d/file.conf' - to add your options or rewrite defaults
# '$LOCAL_CONFDIR/override.d/file.conf' - to override the defaults
#
# See https://rspamd.com/doc/tutorials/writing_rules.html for details

description = "Various headers checks";

symbols = {
    "FORGED_SENDER" {
        weight = 0.3;
        description = "Sender is forged (different From: header and smtp MAIL FROM: addresses)";
    }
    "R_MIXED_CHARSET" {
        weight = 5.0;
        description = "Mixed characters in a message";
        one_shot = true;
    }
    "R_MIXED_CHARSET_URL" {
        weight = 7.0;
        description = "Mixed characters in a URL inside message";
        one_shot = true;
    }
    "FORGED_RECIPIENTS" {
        weight = 2.0;
        description = "Recipients are not the same as RCPT TO: mail command";
    }
    "FORGED_RECIPIENTS_MAILLIST" {
        weight = 0.0;
        description = "Recipients are not the same as RCPT TO: mail command, but a message from a maillist";
    }
    "FORGED_SENDER_MAILLIST" {
        weight = 0.0;
        description = "Sender is not the same as MAIL FROM: envelope, but a message is from a maillist";
    }
    "ONCE_RECEIVED" {
        weight = 0.1;
        description = "One received header in a message";
    }
    "RDNS_NONE" {
        weight = 1.0;
        description = "Cannot resolve reverse DNS for sender's IP";
    }
    "RDNS_DNSFAIL" {
        weight = 0.0;
        description = "PTR verification DNS error";
    }
    "ONCE_RECEIVED_STRICT" {
        weight = 4.0;
        description = "One received header with 'bad' patterns inside";
    }
    "DIRECT_TO_MX" {
        weight = 0.0;
        description = "Message has been directly delivered from MUA to local MX";
    }
    "MAILLIST" {
        weight = -0.2;
        description = "Message seems to be from maillist";
    }
    "BOUNCE" {
      weight = -0.1;
      description = "(Non) Delivery Status Notification";
    }
}