PDF Preview
When composing an email with Mixmax, you can show a preview of your PDF, right in your email.
Open your Settings in the Mixmax dashboard - click Mixmax in the left panel in Gmail - and go to the Composing section of your settings. Next to Message Options, click the box next to PDF previews.
You can always send a PDF as a traditional attachment by using the paperclip icon on the bottom bar and unchecking the box next to Unlimited size.