MailServer | wiki bubu IT

opendkim

ai opendkim opendkim-tools
mkdir /var/spool/postfix/opendkim/
chown opendkim /var/spool/postfix/opendkim
usermod -aG opendkim postfix
YEAR=$(date +'%Y')
DOMTLD=DOM.TLD
mkdir -p /etc/opendkim/keys/$DOMTLD
cd /etc/opendkim/keys/$DOMTLD
opendkim-genkey -s $YEAR -d $DOMTLD
chown opendkim:opendkim *.private
vim /etc/opendkim.conf

vim /etc/default/opendkim

RUNDIR=/var/spool/postfix/ru


      
  
    Tags
          
              MailServer


    


  
      
      mailserver D13 Trixie Debug

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Wed, 12/03/2025 - 18:46

        
      
    
  
  
    
            disable remove
ap pyzor
grep -i pyzor /etc/spamassassin/*.cf
/etc/spamassassin/v310.pre:loadplugin Mail::SpamAssassin::Plugin::Pyzor
 
 
      
  
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              MailServer
              
      

  



    


  
      
      Virtueller Mailserver

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Tue, 11/25/2025 - 12:20

        
      
    
  
  
    
            Diese Dokumentation beschreibt den vollständigen Aufbau eines virtuellen Mailservers unter Debian 13 (Trixie) mit Postfix, Dovecot, LMTP‑Zustellung, TLS‑Absicherung, Alias‑Management und einem klaren Flat‑Mailstore‑Design. Der Fokus liegt auf Stabilität, Übersichtlichkeit und Erweiterbarkeit.
🔧 1. Pakete installieren (Postfix + Dovecot)
Für einen vollständigen virtuellen Mailserver werden folgende Pakete benötigt:
      
  
    Tags
          
              MailServer
              
      

  



    


  
      
      spamassassin

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Mon, 02/27/2023 - 09:10

        
      
    
  
  
    
            ai spamassassin spamd sa-compile spamass-milter re2c pyzor libmail-spamassassin-perl libarchive-zip-perl libidn2-dev libgeo-ip-perl libgeoip-dev perl-doc cpanminus libnet-libidn2-perl libencode-detect-perl libnet-patricia-perl libio-compress-perl libmail-spf-perl libio-socket-inet6-perl libdbi-perl libdbd-sqlite3-perl libwww-perl liblwp-protocol-https-perl libbsd-resource-perl libemail-address-xs-perl libmail-dmarc-perl libdevel-cycle-perl libtext-diff-perl libnet-libidn-perl libmaxmind-db-reader-perl libmaxmind-db-reader-xs-perl libdigest-sha-perl
usermod -a -G spamass-milter 
      
  
    Tags
          
              MailServer
          spam
              
      

  



    


  
      
      milter_mail_macros

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sat, 10/25/2025 - 13:29

        
      
    
  
  
    
            📨 Postfix & SpamAss-Milter Integration Guide
Overview
A complete guide to integrating Postfix with SpamAss-Milter on Debian for effective spam filtering. It covers macro configuration, testing, troubleshooting, and best practices for maintaining clean, reliable mail logs.
      
  
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              MailServer
              
      

  



    


  
      
      spamass-milter

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sat, 10/25/2025 - 12:57

        
      
    
  
  
    
            milter_mail_macros
vim /etc/default/spamass-milter
# spamass-milt startup defaults
# OPTIONS are passed directly to spamass-milter.
# man spamass-milter for details
# Non-standard configuration notes:
# See README.Debian if you use the -x option with sendmail
# You should not pass the -d option in OPTIONS; use SOCKET for that.
# Default, use the spamass-milter user as the default user, ignore
# messages from localhost
OPTIONS="-u spamass-milter -i 127.0.0.1"
# Reject emails with spamassassin scores &

      
  
    Tags
          
              MailServer
              
      

  




    


  
      
      DMARC

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sun, 12/17/2023 - 13:10

        
      
    
  
  
    
            📧 DMARC and SPF Configuration for a Centralized Mail Server
Overview
This guide outlines how to configure SPF and DMARC for multiple domains that all send mail through a single centralized mail server — mail.bubuit.net. The goal is to maintain consistent authentication across all domains, simplify future maintenance, and prevent email spoofing.
1. Central Mail Server
Hostname: mail.bubuit.net
IPv4: 116.202.112.180
      
  
    Tags
          
              MailServer
              
      

  



    


  
      
      opendkim.sh

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Wed, 10/01/2025 - 10:42

        
      
    
  
  
    
            vim scripts/opendkim.sh
#!/bin/bash
# Script Version: 09
# Description: Generate and install OpenDKIM keys for a given domain and append KeyTable + SigningTable entries.

      
  
    Tags
          
              script
          MailServer
              
      

  




    


  
      
      doveadm

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sun, 10/05/2025 - 15:03

        
      
    
  
  
    
            doveadm is the command-line administration tool for Dovecot, used for mailbox management, full-text search, quota checking, and replication tasks.
Syntax
doveadm [global options] <command> [command options]
Example:
doveadm -u user@example.com fetch -A hdr subject
Global Options
Option Description
-u <user>
      
  
    Tags
          
              MailServer
              
      

  



    


  
      
      DKIM, SPF und DMARC-Konfiguration für lists.bubuit.net

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sat, 03/01/2025 - 14:33

        
      
    
  
  
    
            Problemstellung
E-Mails, die von lists.bubuit.net gesendet wurden, wurden von Gmail und anderen Mailservern mit folgendem Fehler abgelehnt:
      
  
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              MailServer
              
      

  



    


  
      
      sendmail_test.sh

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Tue, 07/09/2024 - 11:45

        
      
    
  
  
    
            #!/bin/bash
# Script Name: sendmail_test.sh
# Version: 03
# Description: This script sends a test email using sendmail. The recipient's email address is the first argument.
#              It logs messages to the console only.

# Check if an argument (email address) is provided
if [ -z "$1" ]; then
    TO="root"
else
    TO="$1"
fi

# Email details
SUBJECT="Postfix Test"
FROM="$(whoami)@$(hostname)"
BODY="This is the email body!"

# Function to send email
send_email() {
    if !

      
  
    Tags
          
              script
          MailServer
              
      

  




    


  
      
      SPF

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Thu, 05/04/2023 - 15:13

        
      
    
  
  
    
            ai postfix-policyd-spf-python
Create DNS txt record
v=spf1 mx -all
      
  
    Tags
          
              MailServer
              
      

      
                



          
  
  



    


  
      
      postfix dovecot sasl install

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sun, 09/03/2023 - 16:25

        
      
    
  
  
    
            ai postfix postfix-pcre dovecot-core dovecot-imapd sasl2-bin libsasl2-modules
      
  
    Tags
          
              MailServer
              
      

  



    


  
      
      15-mailboxes.conf

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Tue, 08/20/2024 - 12:54

        
      
    
  
  
    
            namespace inbox {
 # These mailboxes are widely used and could perhaps be created automatically:
 mailbox Drafts {
    auto = subscribe
   special_use = \Drafts
 }
 mailbox Important {
    auto = subscribe
   special_use = \Important 
 }
 mailbox Archive {
    auto = subscribe
   special_use = \Archive
 }
 mailbox Junk {
    auto = subscribe
   special_use = \Junk
 }
 mailbox Trash {
    auto = subscribe
   special_use = \Trash
 }
 # For \Sent mailboxes there are two widely used nam

      
  
    Tags
          
              MailServer
              
      

  




    


  
      
      mail client autoconfig

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Sat, 12/02/2023 - 13:56

        
      
    
  
  
    
            /var/www/srvip/mail/config-v1.1.xml
<?xml version="1.0" encoding="UTF-8"?>
      
  
    Tags
          
              MailServer
              
      

      
                



          
  
  



    


  
      
      pflogsum

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Mon, 02/27/2023 - 09:12

        
      
    
  
  
    
            crontab -e
59 23 * * *    /usr/sbin/pflogsumm -d today /var/log/mail.log | mail -s "pflogsum daily Report `date`" log@DOM.TLD
0 1 * * mon    /usr/sbin/pflogsumm /var/log/mail.log.1 | mail -s "pflogsum weekly Report `date`" log@DOM.TLD
      
  
    Tags
          
              MailServer
          analytics
              
      

  



    


  
      
      mailman

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Thu, 07/06/2023 - 09:08

        
      
    
  
  
    
            sys
vim /etc/hosts
apt install apache2 php-{bcmath,common,curl,fpm,gd,intl,mbstring,mysql,soap,xml,xsl,zip,cli}
ai mailman3-full postfix
vim /etc/mailman3/mailman.cfg
apache
cp /etc/mailman3/apache.conf /etc/apache2/sites-available/mailman.conf
vim /etc/apache2/sites-available/mailman.conf
a2ensite mailman
a2dissite 000-default.conf
      
  
    Tags
          
              MailServer
          APPs
              
      

      
                



          
  
  



    


  
      
      add mail user 

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Wed, 04/19/2023 - 18:29

        
      
    
  
  
    
            adduser USERNAME --shell /usr/sbin/nologin
vim /etc/postfix/virtual
postmap /etc/postfix/virtual
vim /etc/postfix/virtual_domains
postmap /etc/postfix/virtual_domains
postfix reload
IMAP over TLS
mail.DOM.TLD 993
TLS on dedicated port
SMTP over TLS
mail.DOM.TLD 587
TLS on dedicated port
      
  
    Tags
          
              MailServer
              
      

      
                



                



          
  
  



    


  
      
      /etc/opendkim.conf

    
    

      
      
  

      
        Submitted by Andreas Fleckl
 on Wed, 10/04/2023 - 11:20

        
      
    
  
  
    
            # Log to syslog
Syslog            yes
SyslogSuccess           Yes
LogWhy                  Yes
# Required to use local socket with MTAs that access the socket as a non-
# privileged user (e.g. Postfix)
UMask            002
      
  
    Tags
          
              MailServer