===== Overview =====
ClearOS provides both POP and IMAP servers for providing mail delivery to desktop clients.

===== Installation =====
If you did not select this module to be included during the installation process, you must first [[Software Modules|install the module]].

===== Menu =====
You can find this feature in the menu system at the following location:
 
<navigation>Server|Mail|POP/IMAP Server</navigation>

===== Configuration =====
==== Server Configuration ====
=== Mail Server Protocols ===
The mail server supports four different protocols:
  * IMAP
  * Secure IMAP
  * POP
  * Secure POP

We strongly suggest using the secure protocols if possible.  Keep in mind, you will need to generate an [[Certificate Manager|SSL Certificate]] to enable the secure protocol.

=== Push E-mail ===
Some mail clients support the push e-mail feature (also known as the **IMAP Idle** feature).  With this feature enabled on both the server and client, e-mail will appear in your mailbox as soon as it arrives.  This feature is most useful on wireless and handheld devices.  The following mail clients are known to support push e-mail (IMAP Idle):

  * [[http://www.mozilla.com/thunderbird/|Thunderbird]] - Many platforms
  * [[http://www.chatteremail.com/|Chattermail]] - Palm Treo
  * [[http://www.pocketinformant.com/|FlexMail]] - Windows Mobile

==== Mail Client Configuration ====
=== Secure POP - Mozilla Thunderbird ===
If you are using Mozilla's Thunderbird, click on <navigation>Tools|Account Settings</navigation>, then select "Server Settings" from the navigation bar.  Ensure the **Use secure connection (SSL)** checkbox is enabled.

=== Secure POP - MS Outlook/Outlook Express ===
For Outlook and Outlook Express, click on <navigation>Tools|Accounts</navigation>, select the account you wish to configure and click on the <button>Properties</button> button.

Next, click on the "Advanced" tab, and ensure the "This server requires a secure connection (SSL)" checkbox is enabled.

=== Secure POP - Other Mail Clients ===
For other mail clients, similar set-up/configuration will exist.  Please refer to documentation for your mail client for specific instructions.

===== Troubleshooting =====
<note warning>
Do not forget to open up firewall ports for e-mail. You only need to open the POP or IMAP ports if you plan on picking up your mail from outside your local network.  The default ports are listed below:
  * POP - 110
  * Secure POP - 995
  * IMAP - 143
  * Secure IMAP - 993
</note>

===== Links =====
   * [[Users|Adding users to ClearOS]]
  * [[Firewall Incoming|Allowing SMTP mail on the firewall]]