Many events in ATG Portal can trigger alerts, which can be sent by Web channel for display in a portal page or by e-mail. To use e-mail alerts, you need to set the messageFrom and messageReplyTo fields in the Portal e-mail templates to a valid e-mail address for your organization. The following e-mail templates are included in the Portal module.

/alert/src/alert.war/email/DefaultEmail.jsp
/calendar/src/src/calendar.war/email/CalendarEventCreatedEmail.jsp
/calendar/src/src/calendar.war/email/CalendarEventDeletedEmail.jsp
/calendar/src/src/calendar.war/email/CalendarEventEditedEmail.jsp
/calendar/src/src/calendar.war/email/CalendarEventViewedEmail.jsp
/discussion/src/src/discussion.war/email/NewForumEmail.jsp
/docexch/src/src/docexch.war/email/DocCreatedEmail.jsp
/docexch/src/src/docexch.war/email/DocDeletedEmail.jsp
/docexch/src/src/docexch.war/email/DocUpdatedEmail.jsp
/docexch/src/src/docexch.war/email/DocViewedEmail.jsp
/screenscraper/src/doc/Portal/email/FullPageURLChangedEmail.jsp
/screenscraper/src/doc/Portal/email/SharedPageURLChangedEmail.jsp

You may have custom e-mail templates as well. If you do not supply valid e-mail addresses, no alerts will be sent by e-mail and the portal will generate errors if e-mail alerts are configured.