Linux Tutorials on the topic “postfix”

  • Postfix Monitoring With Mailgraph And pflogsumm On Debian Etch

    debian Author: Falko TimmeTags: , , Comments: 4

    Postfix Monitoring With Mailgraph And pflogsumm On Debian Etch This article describes how you can monitor your Postfix mailserver with the tools Mailgraph and pflogsumm. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix (e.g. using amavisd-new). These graphs can be accessed with a browser, whereas pflogsumm ("Postfix Log Entry Summarizer") can be used to send reports of Postfix activity per email.

  • How To Block Spam Before It Enters The Server (Postfix)

    Author: Falko TimmeTags: , Comments: 14

    How To Block Spam Before It Enters The Server (Postfix) The last few weeks have seen a dramatic increase in spam (once again). Estimates say that spam makes now up for 80 - 90% of all emails, and many mail servers have difficulties in managing the additional load caused by the latest spam, and spam filters such as SpamAssassin do not recognize large parts of that spam as they did before. Fortunately, we can block a big amount of that spam at the MTA level, for example by using blacklists, running tests on the sender and recipient domains, etc. An additional benefit of doing this is that it lowers the load on the mail servers because the (resource-hungry) spamfilters have to look at less emails.

  • Virtual Users And Domains With Postfix, Courier And MySQL (Debian Etch)

    debian Author: Falko TimmeTags: , , Comments: 21

    Virtual Users And Domains With Postfix, Courier And MySQL (Debian Etch)This document describes how to install a mail server based on Postfix that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses.

  • Virtual Users With Postfix, PostfixAdmin, Courier, Mailscanner, ClamAV On CentOS

    Author: thimTags: , , Comments: 5

    Virtual Users With Postfix, PostfixAdmin, Courier, Mailscanner, ClamAV On CentOS In this how to I will explain how to setup a Postfix virtual mailserver with Courier-IMAP, Maildrop and Postfix Admin GUI. We will secure our mailserver with Mailscanner and Clamav as anti-virus and Spamassassin as anti-spam.

  • Virtual Users And Domains With Postfix, Courier And MySQL (Ubuntu 6.10 Edgy Eft)

    ubuntu Author: Falko TimmeTags: , , Comments: 5

    Virtual Users And Domains With Postfix, Courier And MySQL (Ubuntu 6.10 Edgy Eft) This document describes how to install a mail server based on Postfix that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses. The resulting Postfix server is capable of SMTP-AUTH and TLS and quota. In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses.

  • Set Up Ubuntu-Server 6.10 As A Firewall/Gateway For Your Small Business Environment

    Author: tychoTags: , , , , Comments: 5

    Set Up Ubuntu-Server 6.10 As A Firewall/Gateway For Your Small Business Environment  This tutorial shows how to set up a Ubuntu 6.10 server ("Edgy Eft") as a firewall and gateway for small/medium networks. The article covers the installation/configuration of services such as Shorewall, NAT, caching nameserver, DHCP server, VPN server, Webmin, Munin, Apache, Squirrelmail, Postfix, Courier IMAP and POP3, SpamAssassin, ClamAV, and many more.

  • Integrating amavisd-new Into Postfix For Spam- And Virus-Scanning

    Author: Falko TimmeTags: , , , Comments: 2

    Integrating amavisd-new Into Postfix For Spam- And Virus-Scanning This article shows how to integrate amavisd-new into a Postfix mail server for spam- and virus-scanning. amavisd-new is a high-performance interface between MTAs such as Postfix and content checkers: virus scanners, and/or SpamAssassin. We will use ClamAV for virus scanning and SpamAssassin for spam scanning in this tutorial.

  • Autoresponders to accompany Virtual Users and Domains with Postfix, Courier and MySQL

    Author: todgermeTags: Comments: 5

    Autoresponders to accompany Virtual Users and Domains with Postfix, Courier and MySQL This guide focuses on making Yaa! (Yet Another Autoresponder!) work with Debian Sarge and the virtual users on Postfix tutorial (see http://www.howtoforge.com/virtual_postfix_mysql_quota_courier). The first thing to understand about the guide is that it uses the Virtual  Delivery Agent (VDA) and as a result any of the auto responders that you could use by passing them to a pipe via a .forward file simply won't work as the VDA does not support .forward expansions.  This limitation can be overcome via Procmail/Maildrop delivery but that is messy and slower especially for mail systems that are heavily used.  The simple answer is Yaa!

  • Postfix with dkfilter (DomainKeys Implementation)

    Author: sohaileoTags: , Comments: 5

    Postfix with dkfilter (DomainKeys Implementation) DomainKeys is an anti-spam software application in development at Yahoo that uses a form of public key cryptography to authenticate the sender's domain. dkfilter is an SMTP-proxy designed for Postfix. It implements DomainKeys message signing and verification. It comprises two separate filters, an "outbound" filter for signing outgoing email on port 587, and an "inbound" filter for verifying signatures of incoming email on port 25. This document is to describe step by step how to install dkfilter for postfix to deploy domainkeys signing and verification.

  • Enhance Your Mail Server With ASSP (Anti-Spam SMTP Proxy)

    Author: ovisTags: , Comments: 7

    Enhance Your Mail Server With ASSP (Anti-Spam SMTP Proxy) ASSP stands for Anti-Spam SMTP Proxy. The ASSP server project is an Open Source platform-independent transparent SMTP proxy server that leverages numerous methodologies and technologies to both rigidly and adaptively identify spam. In short ASSP is the most kickass solution that is both free and works great. It reduced spam to an absurd minimum for me.