To get the statistics working properly Mailster is required to add a tracking image to all outgoing mails. Because plain text mails don’t allow images it’s not possible to send this type of mails with Mailster
However you can send some kind of fake text mails with reduced HTML:
- Create a new campaign
- switch to the HTML view
- remove all content
- start writing your email content
- switch back to regular view
This way you email looks like plain emails but are technically still multipart html emails with working statistics and link tracking.