POP3 Settings

Note: At the top of each Services page, the name of the Service, its Status (Running or Stopped), and a Start/Stop button appears. This allows you to Start or Stop individual Services from your respective web pages, as well as from the Service Administration page.

The POP3 Server lets any POP3 (Post Office Protocol , Version 3) mail client communicate with IMail Server . Supported POP3 clients include Internet Explorer, Netscape Messenger or Communicator, Eudora, Pegasus, NuPOP, Z-Mail, and UNIX mail.

POP3 clients use the "offline" method of accessing the mail server . Mail messages are delivered to the IMail Server system and the mail client periodically connects to the server and downloads the user's mail to the client system. Mail messages are automatically deleted from the server system. Therefore, mail messages are stored only temporarily on the mail server . This method of access is best suited to users who always read their mail from the same client system.

See Request for Comments (RFC ) 1725 for a description of the POP3 protocol.

Important: After making changes, click Save. Stop the service, wait 5-10 seconds and restart the service.

Save Logs To. Choose one of the following from the list box.
- No Log. Select this option to turn off event logging.
- SYSMMDD.TXT. Select to send event information to a file of this name, where MM is the month and DD is the day the log was written. This file is stored in the Spool directory.
- App Log. Select to send information to the Windows Application Log (viewed with the Windows Event viewer).
- Log Server. Select to send event information to the Log file indicated on the Logging tab.
- Enable Debug Messages. Select the check box to write debug messages to the log file.
Use APOP. Select the check box to secure user authorization (password encryption). For more information, see RFC 1939.

Note: APOP works with the IMail user database only.

Enable XTND XMIT Command. Select the check box to enable the IMail Server to accept outbound mail sent via XTND XMIT. Clients such as WinQVT/Net require this functionality.
Allow Remote Password Change. Select the check box to enable internal commands that allow remote password changes with older mail clients (such as an older version of Eudora).
Auto Deny Possible Hack Attempts. Select the check box to enable a remote IP address to be temporarily denied access (Control Access file).

Note: If more than 512 characters are sent in a POP3 command (other than the POP3 DATA command) the remote IP address is temporarily put in the Control Access file until you stop and restart the IMail service. This data appears to the IMail Server as an attempt to hack into the server. The IP address is not displayed in the Control Access list, but it is reported in the log file.

SSL Settings

Enable SSL. Select the check box to enable a dedicated port that accepts only SSL- encrypted connections from the POP3 service. You can change the default port used by the SSL Listener in the SSL port box.
SSL Port. Enter the port used by the dedicated SSL Listener to accept connections.
Enable TLS. Select the check box to enable the POP3 service to accept SSL/TLS connections over the POP3 port through use of the STARTTLS command.

Advanced Options

When logging on to POP3 , the service returns a welcome message that identifies the mail server version and vendor. You can use the POP3 Advanced options to change the service's welcome message, if for example, you wanted to hide the mail server version and vendor information.

Hello Message. Enter the text you want to be displayed in the POP3 service welcome message. The text is limited to 400 characters. If over 400 characters are entered, the default message is used. When APOP is enabled, if the message plus the timestamp exceed 400 characters, the message will be truncated. To revert back to the default message, clear this field.

Warning: The default advanced settings should be appropriate for most installations. If you need to change these settings, be aware that they can change the operation of the server.

Save. Click to save your settings. An "Update Successful" message and the time of the update appear.