While sending a lot of emails on a busy day, have you ever sent a message saying you attached a file but forgot to include it? Outlook 2013 includes a handy feature that reminds you if it appears you forgot to attach a file.

Outlook 2013 Attachment Reminder

The setting should be enabled by default, but if not, go to File > Options > Mail then under the Send Messages section, verify that “Warn Me When I Send a Message that May be Missing an Attachment” is checked.
Outlook Tips
Here’s the typical scenario: You compose and email letting the recipient know you’ve attached a file, but forget to actually include it and hit Send.
Outlook Tips

Outlook will give you an Attachment Reminder message. Click Don’t Send, attach the file, and send the message.
Outlook Tips
Outlook 2013 looks for a sequence of words in the body and subject of the email. Words that will trigger the reminder would be obvious ones like “attach” and “attachment”. Or phrases like “print attachments”, “enclosed”, “see the attached spreadsheet”…etc. It might not always work (depending on the sequence of words), but it’s good to know this feature will have your back. Especially if you’re sending something to your boss and don’t want to be embarrassed by forgetting it.