How would you track if someone opened your plain text email?

It would help to read the previous discussion on tracking ‘opens’ in emails.

Use Links For Tracking Opens In Plain Text Emails

Non-HTML (or “plain text”) emails can not have tracking images – since there is simply no way to embed an image in a plain text email. But, you can actually track “opens” from a plain-text email as well – although the user does have to click on a link in the email. This is exactly what some mass email senders do – they just track who clicks on the links inside their plain text emails, and they then count those as ‘opens’.

If you’re curious about the details of tracking the clicks in your email then you should check out the very next article.