Postfix Mail Limits
Managing Mail Limits The main.cf file contains several settings to manage mail limits. Limit Recipients This parameter limits the number of recipients for a single message. The default is 1000 set in...
View ArticlePostfix Lookup Tables
Lookup Tables are simple tables that allow Postfix to access configuration information that it needs. An example is when an organization would like to rewrite the email addresses so that they look...
View ArticlePostfix Map Types
Maps are the files and databases created from files that are used to look up information. The basic structure of maps are two columns, a left-hand side (key) and a right-hand side (value). key value...
View ArticlePostfix Relay Control
Control Relays Controlling which domains can relay mail through Postfix is a very important setting. You certainly will need to relay mail from the domain that Postfix is on. You do not want Postfix to...
View ArticleQueue Management
Understanding the mail queues, what they do and how they work are important steps to Postfix configuration. Here are the queues listed with a summary of what they do and where they are located....
View ArticlePostfix Default Settings
You can list the default settings with Postfix with this command: postconf -d 2bounce_notice_recipient = postmaster access_map_reject_code = 554 address_verify_default_transport = $default_transport...
View ArticleManage Mail In the Deferred Queue
Deferred queue If Postfix cannot deliver a message to a recipient it is placed in the deferred queue. The queue manager will scan the deferred queue to see it if can place mail back into the active...
View ArticleExplanation of notify_classes in Postfix
The notify_classes allows you to send mail reports to the postmaster. This is additional information that is not usually reported because only the worst situations are typically reported. Here is a...
View ArticleUbuntu 9.04 Postfix Install Evaluation
One of the newest features of Ubuntu 9.04 is the Postfix Mail Server/Dovecot enhancements to make it easier to set up a mail server. This article is a review of those improvements and a tutorial on...
View ArticleWhy Do You Use Postfix?
Recently we asked administrators why they used Postfix Mail Server. Here are some of the responses: “Being able to manage users and pretty much all mail aspects from a MySQL table” “Security. Postfix...
View ArticleChanges in Postfix for Ubuntu 9.10
The postcont -n command for Postfix shows you changes made to the default configuration. Here is a listing of the new Ubuntu 9.10 and the output for Postfix. As you can see nothing too significant...
View ArticlePostfix Features
Sometimes when you are working with Postfix you may be on an older version that does not support a feature you need. Here is a list of the version and the major features that were added for that...
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