1. Antivirus software Clamav installed
Install Clam AntiVirus, a free anti-virus software for Linux, as an anti-virus measure.
By installing this anti-virus software, you can not only scan the entire server for viruses, but also scan incoming and outgoing mail for viruses if you build and configure a mail server.
1.1 Install
# apt -y install clamav clamav-daemon
The clamav-related configuration files are installed in the /etc/clamav/ folder.
1.2 Virus Definition Update
# sed -i -e "s/^NotifyClamd/#NotifyClamd/g" /etc/clamav/freshclam.conf
# systemctl stop clamav-freshclam
# freshclam
Wed May 27 15:03:54 2026 -> ClamAV update process started at Wed May 27 15:03:54 2026
Wed May 27 15:03:54 2026 -> daily.cvd database is up-to-date (version: 28012, sigs: 355458, f-level: 90, builder: svc.clamav-publisher)
Wed May 27 15:03:54 2026 -> main.cvd database is up-to-date (version: 63, sigs: 3287027, f-level: 90, builder: tomjudge)
Wed May 27 15:03:54 2026 -> bytecode.cvd database is up-to-date (version: 339, sigs: 80, f-level: 90, builder: nrandolp)
# systemctl start clamav-freshclam
Edit configuration file
# vi /etc/logrotate.d/clamav-freshclam
create 640 clamav adm
↓
create 640 clamav clamav
Automatic virus definition update confirmation
Ensure that the service is registered for automatic virus definition updates.
# service clamav-freshclam status
It appears as follows
● clamav-freshclam.service - ClamAV virus database updater
Loaded: loaded (/lib/systemd/system/clamav-freshclam.service; disabled; preset: enabled)
Active: active (running) since Wed 2026-05-27 15:04:36 JST; 1min 8s ago
Docs: man:freshclam(1)
man:freshclam.conf(5)
https://docs.clamav.net/
Main PID: 19930 (freshclam)
Tasks: 1 (limit: 4554)
Memory: 2.9M
CPU: 12ms
CGroup: /system.slice/clamav-freshclam.service
└─19930 /usr/bin/freshclam -d --foreground=true
May 27 15:04:36 Lepard systemd[1]: Started clamav-freshclam.service - ClamAV virus database updater.
May 27 15:04:36 Lepard freshclam[19930]: Wed May 27 15:04:36 2026 -> ClamAV update process started at Wed Ma>
May 27 15:04:36 Lepard freshclam[19930]: Wed May 27 15:04:36 2026 -> daily.cvd database is up-to-date (versi>
May 27 15:04:36 Lepard freshclam[19930]: Wed May 27 15:04:36 2026 -> main.cvd database is up-to-date (versio>
May 27 15:04:36 Lepard freshclam[19930]: Wed May 27 15:04:36 2026 -> bytecode.cvd database is up-to-date (ve
Logs are recorded in the file /var/log/clamav/freshclam.log.
1.3 Virus Check Confirmation
①Running manual virus checks
# clamscan --infected --remove --recursive /home
----------- SCAN SUMMARY -----------
Known viruses: 3627866
Engine version: 1.4.3
Scanned directories: 4
Scanned files: 7
Infected files: 0
Data scanned: 0.00 MB
Data read: 0.00 MB (ratio 0.00:1)
Time: 10.704 sec (0 m 10 s)
Start Date: 2026:05:27 15:06:42
End Date: 2026:05:27 15:06:52
Infected files: 0, so no virus
②Virus detection by downloading test viruses
Download a harmless virus and test it for detection.
# wget https://secure.eicar.org/eicar.com.txt
# clamscan --infected --remove --recursive
/root/eicar.com.txt: Eicar-Test-Signature FOUND
/root/eicar.com.txt: Removed.
----------- SCAN SUMMARY -----------
Known viruses: 3627866
Engine version: 1.4.3
Scanned directories: 2
Scanned files: 8
Infected files: 1
Data scanned: 0.02 MB
Data read: 0.01 MB (ratio 2.00:1)
Time: 8.163 sec (0 m 8 s)
Start Date: 2026:05:27 15:07:54
End Date: 2026:05:27 15:08:02
As you can see, it notifies me of the virus by displaying “FOUND” and “Removed.” and “Infected files: 1”. The “--remove” option was added, so the test virus was removed.
1.4 Create a script file to do a full scan
①Create a script file storage directory (/opt/script) in advance.
# mkdir /opt/script
②Create script file
# vi /opt/script/clam-full.sh
Contents of clam-full.sh (new)
#!/bin/sh
echo =========================================
date
hostname
clamscan / \
--infected \
--recursive \
--log=/var/log/clamav/clamscan.log \
--move=/var/log/clamav/virus \
--exclude-dir=^/boot \
--exclude-dir=^/sys \
--exclude-dir=^/proc \
--exclude-dir=^/dev \
--exclude-dir=^/var/log/clamav/virus
if [ $? = 0 ]; then
echo “virus undetected.”
else
echo “virus detection!!”
fi
③execute authorization
# chmod +x /opt/script/clam-full.sh
④Create a folder for virus quarantine
If not, a runtime error will occur because the above script specifies it as an excluded directory.
# mkdir /var/log/clamav/virus
⑤Script Execution
# /opt/script/clam-full.sh
----------- SCAN SUMMARY -----------
Known viruses: 3627866
Engine version: 1.4.3
Scanned directories: 5133
Scanned files: 38519
Infected files: 0
Data scanned: 2916.67 MB
Data read: 1963.64 MB (ratio 1.49:1)
Time: 512.605 sec (8 m 32 s)
Start Date: 2026:05:27 15:10:55
End Date: 2026:05:27 15:19:28
“virus undetected.”
akes quite a long time to complete.
Logs are recorded in the /var/log/clamav/clamscan.log file.
⑤Scheduled virus scan execution with cron
# crontab -e
0 2 * * mon /opt/script/clam-full.sh >> /var/log/clamav/clamascan.log
In the example above, the task runs regularly every Monday at 2:00 a.m.
2. Mail server installation
Postfix was developed as a Mail Transport Agent (MTA) to replace sendmail, and is a mail server that is highly compatible with sendmail, secure, easy to maintain, and fast.
In addition, since Postfix only functions as an SMTP server for sending mail, the POP server Dovecot for receiving mail will be installed separately in the latter half.
2.1 Postfix : Installation Configuration
①Install Postfix
Install Postfix and build an SMTP server; SMTP uses 25/TCP.
To prevent unauthorized mail relay, use the SASL function of Dovecot, described below, and configure Postfix so that authentication is also required for sending.
# apt -y install postfix sasl2-bin
You will be asked to select general configuration settings, select "No configuration " to set them manually later
②Edit configuration file (main.cf)
# cp /usr/share/postfix/main.cf.dist /etc/postfix/main.cf
# vi /etc/postfix/main.cf
# Line 82：Uncomments
mail_owner = postfix
# Line 100：Add Hostname Specification
myhostname = mail.[Domain]
# Per Line 107：Domain Name Specification Addition
mydomain = [Domain]
# Per Line 127：Uncomments
myorigin = $mydomain
# Per Line 141：Uncomments
inet_interfaces = all
# Per Line 189：Uncomments
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
# Per Line 232：Uncomments
local_recipient_maps = unix:passwd.byname $alias_maps
# Per Line 277：Uncomments
mynetworks_style = subnet
# Per Line 294：Self-Network Addendum
mynetworks = 127.0.0.0/8, 192.168.11.0/24
# Per Line 416：Uncomments
alias_maps = hash:/etc/aliases
# Per Line 427：Uncomments
alias_database = hash:/etc/aliases
# Per Line 449：Uncomments
home_mailbox = Maildir/
# Per Line 585：Add a comment and append it below
#smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_banner = $myhostname ESMTP
# Per Line 659：Add
sendmail_path = /usr/sbin/postfix
# Per Line 664：Add
newaliases_path = /usr/bin/newaliases
# Per Line 669：Add
mailq_path = /usr/bin/mailq
# Per Line 675：Add
setgid_group = postdrop
#Per Line 679：Commenting
#html_directory =
# Per Line 683：Commenting
#manpage_directory =
# Per Line 688：Commenting
#sample_directory =
# Per Line 692：Commenting
#readme_directory =
#Add to the last line
#Disable the SMTP VRFY command
disable_vrfy_command = yes
#Request the HELO command from the client
smtpd_helo_required = yes
#Limit sent and received email size to 10MB
message_size_limit = 10485760
#Limit mailbox size to 1GB
mailbox_size_limit = 1073741824
#SMTP Authentication Settings
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_recipient_restrictions = permit_mynetworks, permit_auth_destination, permit_sasl_authenticated, reject
③Edit configuration file (master.cf)
# vi /etc/postfix/master.cf
Line 19,22 : Uncomments
submission inet n - y - - smtpd
# -o syslog_name=postfix/submission
# -o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
# -o smtpd_tls_auth_only=yes
Reflect settings, restart
# newaliases
# systemctl restart postfix
2.2 Dovecot : Installation Configuration
①Install Dovecot
Install Dovecot and build a POP/IMAP server, using 110/TCP for POP and 143/TCP for IMAP.
# apt -y install dovecot-core dovecot-pop3d dovecot-imapd
②Configure Dovecot to provide SASL functionality for Postfix
# vi /etc/dovecot/dovecot.conf
Line 30：Uncomment
listen = *, ::
# vi /etc/dovecot/conf.d/10-auth.conf
Line 10：Uncomment and change (also allow plain text authentication)
disable_plaintext_auth = no
Line 100：add
auth_mechanisms = plain login
# vi /etc/dovecot/conf.d/10-mail.conf
Line 30：Change to Maildir format
mail_location = maildir:~/Maildir
# vi /etc/dovecot/conf.d/10-master.conf
Line 107-109：Uncommented and added
# Postfix smtp-authi
unix_listener /var/spool/postfix/private/auth {
mode = 0666
user = postfix
group = postfix
}
③Reflect settings, reboot
# systemctl restart dovecot
2.3 Email User Account Registration
Register a user account for e-mail.
This setting is for when a user account on the OS is also used for e-mail.
If you want to use mail with a user account on the OS, no additional configuration is required, just register the OS user
①Mail client installed
# apt -y install mailutils
②Mailboxes are set to refer to Maildir
# echo 'export MAIL=$HOME/Maildir/' >> /etc/profile.d/mail.sh
2.4 Opening Ports
# ufw allow pop3
# ufw allow imap
# ufw allow smtp
# ufw reload
2.5 operation check ①
①Send test mail to yourself [mail (user name)@(host name)].
user name : huong
# su - huong
$ mail huong@localhost
Cc:
Subject: Test Mail
This is the first mail.
Ctrl + D key to exit the main text
Check incoming mail
$ mail
"/home/huong/Maildir/": 1 message 1 new
>N 1 huong Wed May 27 06:37 13/427 Test Mail
? 1
Return-Path: <huong@Lepard>
X-Original-To: huong@localhost
Delivered-To: huong@localhost
Received: by mail.korodes.com (Postfix, from userid 1000)
id 32A4BC05B1; Wed, 27 May 2026 15:37:50 +0900 (JST)
To: <huong@localhost>
Subject: Test Mail
User-Agent: mail (GNU Mailutils 3.15)
Date: Wed, 27 May 2026 15:37:50 +0900
Message-Id: <20260527063750.32A4BC05B1@mail.korodes.com>
From: huong <huong@Lepard>
This is the first mail.
? q
Saved 1 message in /home/huong/mbox
Held 0 messages in /home/huong/Maildir/
2.6 operation check ②
Set up and confirm your account in Mozilla Thunderbird (for OS user huong as mail user)
Start Thunderbird and click [New Account][Email] in the [Three] button-menu in the upper right corner.
Full name : any name
Email address : huong@<domain-name>
Enter the information and click "Continue".
Click on [EDIT CONFIGURATION]
Incoming Server Settings
Set [Connection security] to [None] and click [Continue].
Outgoing Server Settings
Set [Connection security] to [None] and click [Test].
Click [Continue]
Enter the [user's password] in the "Password" field and click "Continue"
Click [Continue]
Click "Finish" when the email account has been successfully created.
3 Applied ClamAV to mail server Postfix
Set up Postfix and Clamav to work together to scan incoming and outgoing mail in real time.
①Install Amavisd and Clamav Daemon and start Clamav Daemon
# apt -y install clamav-daemon amavisd-new
If the server is not using a fully qualified domain name (FQDN) as the hostname, Amavis may fail to start. Also, since the OS hostname may change, set a valid hostname directly in the Amavis configuration file
# vi /etc/amavis/conf.d/05-node_id
Line 11 : Uncomment and change to your own host
use strict;
# $myhostname is used by amavisd-new for node identification, and it is
# important to get it right (e.g. for ESMTP EHLO, loop detection, and so on) .
chomp($myhostname = `hostname --fqdn`);
# To manually set $myhostname, edit the following line with the correct Full y
# Qualified Domain Name (FQDN) and remove the # at the beginning of the line .
#
$myhostname = "mail.<domain name>";
1; # ensure a defined return
②Virus Scan Enable
# vi /etc/amavis/conf.d/15-content_filter_mode
Line 13-14 : Uncomment and enable virus scan
@bypass_virus_checks_maps = (
\%bypass_virus_checks, \@bypass_virus_checks_acl, \$bypass_virus_checks_re);
③Register your own domain name
# echo '<yourDomain>' > /etc/mailname
④Edit configuration file (Main.cf)
# vi /etc/postfix/main.cf
Add to last line
content_filter=smtp-amavis:[127.0.0.1]:10024
⑤Edit configuration file (master.cf)
# vi /etc/postfix/master.cf
# Add all the following lines to the last line
smtp-amavis unix - - n - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
127.0.0.1:10025 inet n - n - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks=127.0.0.0/8
-o strict_rfc821_envelopes=yes
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
⑥Settings reflect
# usermod -G clamav amavis
# usermod -G amavis clamav
# systemctl restart clamav-daemon amavis postfix
When you send an e-mail to yourself on Thuderbird, etc., it is successful if you see the following message in the header of the incoming e-mail.
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
Return-Path: xxxxx@xxxxxxx.com
X-Original-To: xxxxx@xxxxxxx.com
Delivered-To: xxxxx@xxxxxxx.com
Received: from localhost (localhost [127.0.0.1])
by mail.xxxxxxx.com (Postfix) with ESMTP id D2C87A002F
for xxxxx@xxxxxxx.com; Wed, 27 May 2026 15:52:45 +0900 (JST)
X-Virus-Scanned: Debian amavis at xxxxxxx.com
Received: from mail.xxxxxxx.com ([127.0.0.1])
by localhost (mail.xxxxxxx.com [127.0.0.1]) (amavis, port 10024) with ESMTP
id pdZKQYgBYANB for xxxxx@xxxxxxx.com;
Wed, 27 May 2026 15:52:45 +0900 (JST)
Received: from [192.168.11.8] (buffalo.setup [192.168.11.1])
by mail.xxxxxxx.com (Postfix) with ESMTPA id B9081A001F
for xxxxx@xxxxxxx.com; Wed, 27 May 2026 15:52:45 +0900 (JST)
Message-ID: c8d2d46a-313a-46b6-a95e-ba341e819f7f@xxxxxxx.com
Date: Wed, 27 May 2026 15:52:44 +0900
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
From: xxxxx xxxxx@xxxxxxx.com
Content-Language: en-US
To: xxxxx xxxxx@xxxxxxx.com
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Send yourself an email with the body text "X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*" and verify that the email is discarded and does not arrive.
4 Apply spam checks to the mail server
Using SpamAssassin and procmail for spam checking
4.1 spamassassin installation
①Install
# apt update
# apt upgrade
# apt -y install spamassassin spamass-milter
②SpamAssassin Configuration
# vi /etc/mail/spamassassin/v310.pre
Line 24 : Uncomment
loadplugin Mail::SpamAssassin::Plugin::DCC
➂SpamAssassin Configuration File Update Script
# vi /opt/script/spamassassin-update.sh
#!/bin/bash
cd /etc/mail/spamassassin
wget -q https://github.com/kittyfreak/spamassassin_user_prefs/archive/refs/heads/main.zip
[ $? -ne 0 ] && exit
unzip main.zip >/dev/null 2>&1
[ $? -ne 0 ] && exit
rm -f main.zip
mv spamassassin_user_prefs-main/user_prefs .
rm -rf spamassassin_user_prefs-main
diff user_prefs user_prefs.org > /dev/null 2>&1
if [ $? -ne 0 ]; then
cp user_prefs local.cf
echo "report_safe 0" >> local.cf
echo "rewrite_header Subject SPAM" >> local.cf
if [ -f /etc/init.d/spamd ]; then
/etc/init.d/spamd restart > /dev/null
else
systemctl restart spamd > /dev/null
fi
fi
cp user_prefs user_prefs.org
Grant the spamassassin-update script execution permissions and run it.
# chmod 700 /opt/script/spamassassin-update.sh
# /opt/script/spamassassin-update.sh
Verify that the SpamAssassin configuration file (local.cf) has been created with the current date in the /etc/mail/spamassassin directory.
※ Install unzip beforehand
# ls -l /etc/mail/spamassassin/
total 1660
-rw-r--r-- 1 root root 1292 Feb 8 2025 65_debian.cf
-rw-r--r-- 1 root root 1644 Feb 8 2025 init.pre
-rw-r--r-- 1 root root 500630 May 28 18:42 local.cf
-rw-r--r-- 1 root root 127072 May 28 18:42 main.zip.1
-rw-r--r-- 1 root root 118 Feb 8 2025 sa-compile.pre
drwxr-xr-x 2 root root 4096 May 27 15:44 sa-update-hooks.d
-rw-r--r-- 1 root root 500588 Apr 30 2023 user_prefs
-rw-r--r-- 1 root root 500588 May 28 18:42 user_prefs.org
-rw-r--r-- 1 root root 2257 May 28 18:38 v310.pre
-rw-r--r-- 1 root root 1163 Feb 8 2025 v312.pre
-rw-r--r-- 1 root root 2411 Feb 8 2025 v320.pre
-rw-r--r-- 1 root root 1232 Feb 8 2025 v330.pre
-rw-r--r-- 1 root root 1015 Feb 8 2025 v340.pre
-rw-r--r-- 1 root root 1310 Feb 8 2025 v341.pre
-rw-r--r-- 1 root root 1514 Feb 8 2025 v342.pre
-rw-r--r-- 1 root root 1261 Feb 8 2025 v343.pre
-rw-r--r-- 1 root root 1477 Feb 8 2025 v400.pre
-rw-r--r-- 1 root root 1118 Feb 8 2025 v401.pre
Set up a cron job to automatically run the script that updates the SpamAssassin configuration file daily.
# crontab -e
0 2 * * * /opt/script/spamassassin-update.sh > /dev/null 2>&1
④SpamAssassin Milter Startup and Automatic Startup Configuration
# systemctl start spamass-milter
# systemctl enable spamass-milter
spamass-milter.service is not a native service, redirecting to systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable spamass-milter
- Create a directory named ".Spam" in Maildir format for storing spam emails
- Creation must be performed by the target user.
# su - <user name>
Create a directory named ".Spam"
$ cd Maildir
$ /usr/bin/maildirmake.dovecot .Spam
$ su -
Password:
4.2 Preparing Procmail
①Installing Procmail
# apt -y install procmail
If installed, the following result will be returned.
# which procmail
/usr/bin/procmail
②Procmail Configuration
Entering settings in /etc/procmailrc, which controls all mail filtering, will apply them to all users.
When written in the individual user's mail filter file, /home/[user]/.procmailrc, the filter applies only to that user.
This time, to apply it to all users, we will write it in /etc/procmailrc.
# vi /etc/procmailrc
Set the path
PATH=/bin:/usr/bin:/usr/local/bin
Mailbox Settings
MAILDIR=$HOME/Maildir
DEFAULT=$MAILDIR/
Specify the output location for Procmail log files
LOGFILE=$MAILDIR/procmaillog
Specify the path to the lock file
LOCKFILE=$HOME/.lockmail
If the mail header does not contain an "X-Spam-***" entry, SpamAssassin will be launched.
:0fw
*!^X-Spam.*
|spamassassin
If the email header contains the entry "X-Spam-Status: Yes", the email will be stored in the ".Spam" directory.
:0
*^X-Spam-Status: Yes
$MAILDIR/.Spam/
4.3 Postfix Configuration
① Editing main.cf
# vi /etc/postfix/main.cf
Line 477 : Uncomments
mailbox_command = /usr/bin/procmail
②Reflecting Settings and Launching
# systemctl start spamd
# systemctl restart postfix
4.4 Learning about spam emails
Teach the system to recognize all contents within every user's ".Spam" directory as spam email.
①Learning about spam emails
# /usr/bin/sa-learn --spam /home/*/Maildir/.Spam/cur
Learned tokens from 0 message(s) (0 message(s) examined).
②Learning regular emails
# /usr/bin/sa-learn --ham /home/*/Maildir/cur
Learned tokens from 4 message(s) (4 message(s) examined).
③Create a script and register it with Cron
Name the file something like "spam-learns.sh" and place it under /opt/scripts.
After saving the script, grant it executable permissions using chmod 750 spam-learns.sh.
# vi /opt/script/spam-learns.sh
#! /bin/sh
Learning about spam emails
/usr/bin/sa-learn --spam /home/*/Maildir/.Spam/cur
Learning regular emails
/usr/bin/sa-learn --ham /home/*/Maildir/cur
If you want to force the deletion of the contents of the spam email storage directory, add the following line:
/bin/rm -f /home/*/Maildir/.Spam/cur
# chmod 750 /opt/script/spam-learns.sh
Once spam-learns.sh is created, create the definition file directly under /lib/systemd/system. Name it with a .service extension, such as spam-learns.service.
Define the Type as simple.
# cd /lib/systemd/system
# vi spam-learns.service
[Unit]
Description=demo sample node.js program
[Service]
Type=simple
ExecStart= /opt/script/spam-learns.sh
Restart=always
[Install]
WantedBy=multi-user.target
# crontab -e
0 4 * * * /opt/script/spam-learns.sh
# systemctl enable spam-learns
Created symlink /etc/systemd/system/multi-user.target.wants/spam-learns.service → /lib/systemd/system/spam-learns.service.
④If you send an empty email to yourself using Thunderbird or similar software and see a message like the following in the received email header, it means the process was successful.
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
Return-Path: xxxxx@xxxxxxx.com
X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-25) on Lepard
X-Spam-Level: **
X-Spam-Status: No, score=2.3 required=13.0 tests=ALL_TRUSTED,
CONTENT_TYPE_PRESENT,EMPTY_MESSAGE autolearn=no autolearn_force=no
version=4.0.1
-----------------------------------------------------------------------
Subject:
⑤Spam Check Confirmation
Confirm that when you send an email with the subject line "XJSC4JDBQADN1.NSBN32IDNENGTUBE-STANDARD-ANTI-UBE-TEST-EMAILC.34X" to yourself, the email is not delivered and is instead filtered into the Spam folder.
The header displays as follows:
Check the emails under /home/[user]/Maildir/.Spam/new/
Return-Path: xxxxx@xxxxxxx.com
X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-25) on Lepard
X-Spam-Flag: YES
X-Spam-Level:*********************************************
X-Spam-Status: Yes, score=1001.8 required=13.0 tests=ALL_TRUSTED,
CONTENT_TYPE_PRESENT,GTUBE,HTML_MESSAGE,MPART_ALT_DIFF,
MULTIPART_ALTERNATIVE autolearn=no autolearn_force=no version=4.0.1
X-Spam-Report:
* 0.1 ALL_TRUSTED Passed through trusted hosts only via SMTP
* 1000 GTUBE BODY: Generic Test for Unsolicited Bulk Email
* 0.1 MULTIPART_ALTERNATIVE Multipart/alternative
* -0.1 CONTENT_TYPE_PRESENT exists:Content-Type
* 1.0 HTML_MESSAGE BODY: HTML included in message
* 0.7 MPART_ALT_DIFF BODY: HTML and text parts are different
* 1.0 HTML_MESSAGE BODY: HTML included in message
X-Original-To: xxxxx@xxxxxxx.com
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