Linux Mail Server Setup and Howto Guide

This article describes how to configure a vacation autoresponder in Postfix mail server so email senders can be informed when the recipient is not available.

This article will show you how to configure Postfix and Dovecot to handle multiple domains stored in MySQL. Postfix Admin is used to manage the domains, mailboxes and aliases in MySQL. See How to Install Postfix Admin to setup the MySQL database that will be used by Postfix and Dovecot.

Postfix Admin is a web based interface used to manage mailboxes, virtual domains and aliases. This article will show you how to install Postfix Admin to simplify management of mailboxes, domains and aliases.

The version of Postfix that comes with Red Hat Enterprise Linux 5 or CentOS 5 does not support MySQL lookups. You can build your own custom Postfix RPM or get a prebuilt RPM from the CentOS Plus repository. You can use the CentOS repository in RHEL since CentOS is binary compatible with RHEL. This article describes how to install Postfix with MySQL lookup table support from the CentOS Plus repository.

SMTP Authentication prevents unauthorized user from sending out spam mails. But some applications do not support SMTP Authentication. Example of these are web applications with mail sending features (Microsoft Office Sharepoint Server, PHP based applications, etc).

This article contains a collection of howtos for the Postfix SMTP mail server software in Linux.

Postfix does not support mailbox quota. But thanks to Anderson Nadal’s Postfix Virtual Delivery Agent (VDA) patches, it can. To use the Postfix VDA requires two things, first Postfix must be built with the VDA patches and second, virtual user accounts must be used. You can get the Postfix RPM with VDA patches here.

You can create a text file in Postfix containing an alias email and several destination emails. There are two ways to implement aliasing and mailing list in Postfix depending on how it is configured.

Below are custom built Postfix RPM packages configured with enough options to support all the Postfix features described on this website. These packages are provided to save you time from building your own. The Postfix features enabled in these builds are LDAP, TLS, MySQL, SASL 2 and VDA.

SMTP Authentication (SMTP Auth) provides an access control mechanism that can be used to allow legitimate users to relay mail while denying relay service to unauthorized users, such as spammers.