Two of the features added by the Outlook add-on are reminders that check each email message when the user clicks the send button in the email program. The first reminder will check if a subject line has been added to the email. If that is not the case it will display a small popup window notifying the user of the missing subject line. The user then has the option to cancel sending the email to go back into editing mode and add a subject line or send the email anyway.

The second reminder will look for keywords in the email body that suggest that an attachment should have been added to the email message. If it finds a keyword but not attachment it will notify the user as well.

The last feature that is added by the Microsoft Outlook 2007 Essentials add-in is the ability to print a selection of the email message. This is done by right-clicking an email, selecting Outlook Essentials Mail Viewer, selecting the part of the email to be printed and right-clicking again to print the selection.

The Microsoft Outlook add-in might be useful for some users who either want to be extra careful to never forget to add attachments and subject lines to their email messages or who want to have the option to print a selection of emails.