Email tracking for Xenforo

Anyone know any simple systems to track Xenforo mail opens? I would love to know how many are opening each email I send.

 

I'm using Sendgrid to send mail. You can track click and opening rate with sendgrid.

 

You can integrate your Xenforo setup with Pepipost SMTP to deliver the emails. By doing this you will be able to track the email opens, clicks, bounces, unsubscribes and abuse complaints all in Real Time.
Here is the quick Pepipost-Xenforo integration guide: http://support.pepipost.com/knowledge_base/topics/xenforo