Attachment Alarm for Outlook will never let you forget to add an attachment if the body of the message implies it. The add-in is very easy-to-use and requires no hard tuning. You just specify the words and phrases that imply an attachment and add them to the Keywords list. Outlook Attachment Alarm scans all outgoing messages and if it finds words or phrases from the Key words list, it raises the alarm and suggests inserting the attachment.

The license of this software is Free Trial Software, the price is $19.95, you can free download and get a free trial.