Email services: Postfix

Email services: Postfix

Postfix is the default Mail Transfer Agent (MTA) for Ubuntu

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Rich set of features:

• Protocols:
• SMTP
• DKIM
• DSN status
• ETRN
• IPv6
• SASL authentication
• TLS encryption/authentication
• QMQP
• Junk mail control
• Databases:
• Berkley
• CDB
• LDAP
• MySQL
• PostgreSQL
• Mailbox and Maildir formats
• Virtual domains
• Address masquerading
• Selective address rewriting
• VERP envelope return
address

Postfix installation

Installing Postfix:

sudo apt-get install postfix

The configuration screens will come up as part of the installation.

To reconfigure at a later time:

sudo dpkg-reconfigure postfix

Or, you can edit the Postfix configuration file /etc/ postfix/main.cf. After editing, restart:

Install it:

sudo apt-get install postfix

Postfix configuration

Sample values:
• Internet Site
• mail.example.com
• peter
• mail.example.com,

localhost.localdomain, localhost
• No
• 127.0.0.0/8 [::ffff:127.0.0.0]/104 [:: 1]/128 192.168.0/24
• 0
• +
• all

Check sources such as these for details on configuration:

• http://flurdy.com/docs/postfix/
• http://ubuntuforums.org/ showthread.php?t=780509
• http://en.wikipedia.org/wiki/ Email#Workings

SMTP authentication

Allows a client to identify itself. Once authenticated, the SMTP server will allow the client to relay mail.

Configuration for SMTP-AUTH is done with the Dovecot package:

Install it:

sudo apt-get install dovecot-postfix

In production, you will need to configure the SSL
certificate and key to be used with authentication and
encryption.

sudo apt-get install dovecot-postfix

Test by sending yourself an email

Install nail, a command line emailer:

sudo apt-get install nail

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