As pontuações do SpamAssassin são estranhamente baixas + diferentes da análise manual, fazendo com que quase todos os spams passem por

Question

Estou tendo problemas com o SpamAssassin; está atribuindo pontuações de e-mails que são muito mais baixas do que deveriam. Além disso, as pontuações atribuídas por e-mail são diferentes dos resultados da execução de spamassassin -t no mesmo e-mail após o fato. Por exemplo, aqui está um relatório de pontuação do email de spam retirado dos cabeçalhos do email no meu cliente de email:

Content analysis details:   (1.3 points, 5.0 required)

  pts rule name              description
 ---- ---------------------- --------------------------------------------------
  0.0 URIBL_BLOCKED          ADMINISTRATOR NOTICE: The query to URIBL was blocked.
                             See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                          for more information.
                             [URIs: goatkoo.us]
 -0.0 SPF_HELO_PASS          SPF: HELO matches SPF record
  0.0 DATE_IN_FUTURE_06_12   Date: is 6 to 12 hours after Received: date
 -0.0 SPF_PASS               SPF: sender matches SPF record
  0.0 HTML_MESSAGE           BODY: HTML included in message
  0.0 HTML_FONT_LOW_CONTRAST BODY: HTML font color similar or identical to
                         background
  1.3 RDNS_NONE              Delivered to internal network by a host with no rDNS
  0.0 T_REMOTE_IMAGE         Message contains an external image

Enquanto isso, os resultados de spamassassin -t :

Content analysis details:   (4.5 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 0.0 URIBL_BLOCKED          ADMINISTRATOR NOTICE: The query to URIBL was blocked.
                            See
                            http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                         for more information.
                            [URIs: wilsonbiggs.com]
 1.9 URIBL_ABUSE_SURBL      Contains an URL listed in the ABUSE SURBL blocklist
                            [URIs: goatkoo.us]
 1.2 RCVD_IN_BL_SPAMCOP_NET RBL: Received via a relay in bl.spamcop.net
               [Blocked - see <http://www.spamcop.net/bl.shtml?185.73.200.38>]
-0.0 SPF_PASS               SPF: sender matches SPF record
 0.0 DATE_IN_FUTURE_06_12   Date: is 6 to 12 hours after Received: date
-0.0 SPF_HELO_PASS          SPF: HELO matches SPF record
 0.0 HTML_MESSAGE           BODY: HTML included in message
 0.0 HTML_FONT_LOW_CONTRAST BODY: HTML font color similar or identical to
                            background
 1.3 RDNS_NONE              Delivered to internal network by a host with no rDNS
 0.0 T_REMOTE_IMAGE         Message contains an external image

Não tenho regras personalizadas definidas. Eu tenho exim4 e courier, e uso o ajenti-v como um painel de controle; em ajenti-v, tenho a seguinte configuração configurada para o exim4:

Configuração personalizada:

SMTP_PORT == 25:587
LOCAL_INTERFACES == <; 0.0.0.0.25 ; 0.0.0.0.587 ; 0.0.0.0.465 ; [::0]:25 ; [::0]:587 ; [::0]:465
smtp_accept_max = 50

spamd_address = 127.0.0.1 783
ACL_SMTP_DATA == acl_custom_check_data
USE = "exiscan"

ACLs personalizadas:

acl_custom_check_data:

  deny
    message = Message headers fail syntax check
    !verify = header_syntax

  warn spam = nobody:true
    add_header = X-Spam-Score: $spam_score ($spam_bar)
    add_header = X-Spam-Report: $spam_report

  warn spam = nobody
    remove_header = Subject
    add_header = Subject: ***SPAM (score: $spam_score)*** $rh_Subject:

  warn message = Content Policy Restriction: Mails to undisclosed recipients are not permitted
    condition = ${if eq{$h_TO:}{undisclosed-recipients:;} {true}{false}}

  accept

Roteadores personalizados:

maildir_spam:
  driver    = accept
  transport = maildir_spam_delivery
  condition = ${if def:h_X-Spam_score: {true}}

Transportes personalizados:

maildir_spam_delivery:
  driver = appendfile
  maildir_format = true
  directory = /var/vmail/$domain/$local_part/.Spam
  user = mail
  create_directory
  delivery_date_add
  envelope_to_add
  return_path_add
  group = mail
  mode = 0600

Devido a esses problemas, recebo mais de 120 mensagens de spam por dia. Obrigado a todos pela ajuda!