You can use Smartermail File Storage to send files larger than email permits or more securely than normal email.
File Storage allows you to upload a file and then send a link (rather like Dropbox). You send that link to the recipient and they click the link to download the file. The file can have a password and you can also set the link to expire so it's only accessible for a limited time.
This isn't 100% secure if you send the link and the password both through email, but it's far more secure than a normal email.
The file upload has to be done through Smartermail - then you can get a link and send it like a normal email.



Now go back to your email (either Smartermail or Outlook) and send the link and the password. If you want to be more secure, send the link by email and send the password by some other means (text or phone would be to possibilities.)