Before following this procedure, reconfirm the procedures outlined here (validating both the ASP script timeout and the Session Timeout).

Script Timeout: http://www.mailenable.com/kb/content/article.asp?ID=ME020033
Session Timeout: http://www.mailenable.com/kb/content/article.asp?ID=ME020120

If the error still occurs then the following MailEnable registry keys can be altered:

MailEnable has the ability to configure two specific timeouts in relation to IIS. These are referred to as the session timeout and script timeout values. They are configured when a mail user first loads the web mail application.

The setting for the script timeout is typically not related to session timeout issues. In any case, the default value for the script timeout is 30 minutes, and can be changed via the registry. The value for the IIS MMC can also be configured (which will override the setting MailEnable applies).

The setting can be configured under via the following registry key:

KeyRoot: HKEY_LOCAL_MACHINE\SOFTWARE\Mail Enable\Mail Enable\Services\WEBMAIL\Options
KeyName: ScriptTimeout
Recommended Value: 1800 (1800 seconds :: 30 minutes)
Notes: The registry key does not exist by default and therefore must be created.

The setting for the Session Timeout could be related to the problem (although the default value should far exceed the timeout). The registry key to add to configure the timeout follows:

KeyRoot: HKEY_LOCAL_MACHINE\SOFTWARE\Mail Enable\Mail Enable\Services\WEBMAIL\Options
KeyName: SessionTimeout
Recommended Value: 40 (i.e. 40 minutes)
Notes: The registry key does not exist by default and therefore must be created.

Note: To apply these settings, the Web Server will need to be restarted. This can be done via the Service Control Manager or from the command prompt using IISRESET.