Linux.
image::images/Proxmox-Mailprocessing.png[]
+
+Features
+--------
+
+Spam detection
+~~~~~~~~~~~~~~
+
+{pmg} uses a wide variety of local and network tests to identify spam
+mail. Here is a short list of used filtering methods:
+
+Receiver Verification::
+
+Many of the junk messages reaching your network are emails to
+non-existent users. {pmg} detects these emails on SMTP
+level, which means before they are transferred to your networks. This
+reduces the traffic to be analyzed for spam and viruses up to 90% and
+reduces the working load on your mail servers and scanners.
+
+Sender policy framework (SPF)::
+
+Sender Policy Framework (SPF) is an open standard for validating
+emails and to prevent sender IP address forgery. SPF allows the
+administrator of an Internet domain to specify which computers are
+authorized to send emails with a given domain by creating a specific
+SPF record in the Domain Name System (DNS).
+
+DNS-based Blackhole List::
+
+A DNS-based Blackhole List (DNSBL) is a means by which an Internet
+site may publish a list of IP addresses, in a format which can be
+easily queried by computer programs on the internet. The technology is
+built on top of the Domain Name System. DNSBLs are used to publish
+lists of addresses linked to spamming.
+
+SMTP Whitelist::
+
+Exclude senders from SMTP blocking. To prevent all SMTP checks
+(Greylisting, Receiver Verification, SPF and RBL) and accept all
+e-mails for the analysis in the filter rule system, you can add the
+following to this list: Domains (Sender/Receiver), Mail address
+(Sender/Receiver), Regular Expression (Sender/Receiver), IP address
+(Sender), IP network (Sender)
+
+Bayesian Filter - Automatically trained statistical filters::
+
+Some particular words have a higher probability of occurring in spam
+emails rather than in legitimate emails. By being trained to
+recognize those words, the Bayesian checks every email and adjusts the
+probabilities of it being a spam word or not in its database. This is
+done automatically.
+
+Black- and Whitelists::
+
+Black- and Whitelists are an access control mechanism to accept,
+block, or quarantine emails to recipients. This allows you to tune the
+rule-system by applying different objects like domains, email address,
+regular expression, IP Network, LDAP Group, and others.
+
+Autolearning algorithm::
+
+{pmg} gathers statistical information about spam
+emails. This information is used by an autolearning algorithm, so the
+system becomes smarter over time.
+
+Spam Uri Realtime BlockList (SURBL)::
+
+SURBLs are used to detect spam based on message body URIs (usually web
+sites). This makes them different from most other Real-time
+Blocklists, because SURBLs are not used to block spam senders. SURBLs
+allow you to block messages that have spam hosts which are mentioned
+in message bodies.
+
+Greylisting::
+
+Greylisting an email from a sender your system does not recognize,
+means, that it will be temporarily rejected. Since temporary failures
+are built into the RFC specifications for mail delivery, a legitimate
+server will try to resend the email later on. This is an effective
+method because spammers do not queue and reattempt mail delivery as is
+normal for a regular Mail Transport Agent.
++
+Greylisting can reduce e-mail traffic up to 50%. A greylisted email
+never reaches your mail server and thus your mail server will not send
+useless "Non Delivery Reports" to spammers.
+
+SMTP Protocol Tests::
+
+{postfix} is able to do some sophisticated SMTP protocol tests (see
+`man postscreen`). Most spam is sent out by zombies (malware on
+compromised end-user computers), and those zombies often try to
+maximize the amount of mails delivered. In order to do that, many of
+them violates the SMTP protocol specification and can thus be detected
+by these tests.
+
+
+Virus detection
+~~~~~~~~~~~~~~~
+
+{pmg} integrates {clamav}, which is an open-source (GPL) antivirus
+engine designed for detecting Trojans, viruses, malware and other
+malicious threats.
+
+It provides a high performance mutli-threaded scanning daemon, command
+line utilities for on demand file scanning, and an intelligent tool
+for automatic signature updates.
+
+
+Object-Oriented Rule System
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The object-oriented rule system enables custom rules for your
+domains. It’s an easy but very powerful way to define filter rules by
+user, domains, time frame, content type and resulting action. {pmg}
+offers a lot of powerful objects to configure your own custom system.
+
+WHO - objects::
+
+Who is the sender or receiver of the e-mail?
+
+WHAT - objects::
+
+What is in the e-mail?
+
+WHEN - objects::
+
+When is the e-mail received by {pmg}?
+
+ACTIONS - objects::
+
+Defines the final actions.
+
+Every rule has five categories FROM, TO, WHEN, WHAT and ACTION. Every
+of these categories can contain several objects and a direction (in,
+out or both).
+
+Options range from simple spam and virus filter setups to
+sophisticated, highly customized configurations blocking certain types
+of e-mails and generating notifications.
+
+
+Spam Quarantine
+~~~~~~~~~~~~~~~
+
+Identified Spam mails can be stored to the user accessible Spam
+quarantine. Thus users can view and manage there Spam mails by
+themselves.
+
+
+Tracking and Logging
+~~~~~~~~~~~~~~~~~~~~
+
+The innovative Proxmox Message Tracking Center tracks and summarizes
+all available logs. With the web-based and user friendly management
+interface, the IT admins can easily overview and control all
+functions from a single screen.
+
+The Message Tracking Center is very fast and powerful, tested on {pmg}
+sites processing over a million emails per day. All different log
+files from the last 7 days can be queried and the results are
+summarized by an intelligent algorithm.
+
+- Arrival of the email
+- Proxmox filtering processing with results
+- Internal queue to your email server
+- Status of final delivery
+
+
+High Availability with Proxmox HA Cluster
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To provide a 100% secure email system for your business, we developed
+Proxmox High Availability (HA) Cluster. The Proxmox HA Cluster uses a
+unique application level clustering scheme, which provides extremely
+good performance. Fast set-up within minutes and a simple, intuitive
+management keep resource needs low. After temporary failures, nodes
+automatically reintegrate without any operator interaction.
+
+LDAP integration
+~~~~~~~~~~~~~~~~
+
+It is possible to query user and group data from LDAP servers. This
+may be used to build special filter rules, or just to provide
+authentication services for the Spam quarantine GUI.
+
+
+Fetchmail integration
+~~~~~~~~~~~~~~~~~~~~~
+
+{pmg} allows you to fetch mail from other IMAP or POP3 servers.
+
+
+Flexible User Management
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+The administration interface uses a role based access control scheme,
+using the following roles:
+
+Superuser::
+
+This role is allowed to do everything (reserved for user 'root').
+
+Administrator::
+
+Full access to mail filter setup, but not allowed to change network setup.
+
+Quarantine Manager::
+
+Is able to view and manage the Spam Quarantine.
+
+Auditor::
+
+Has read-only access to the whole configuration, can access logs and
+view statistics.
+
+
+Your benefit with {pmg}
+-----------------------
+
+* Open source software
+* No vendor lock-in
+* Linux kernel
+* Fast installation and easy-to-use
+* Web-based management interface
+* REST API
+* Huge active community
+* Low administration costs and simple deployment
+
+
+include::getting-help.adoc[]
projects / pmg-docs.git / blobdiff