Hi Linda, it depends on what you mean by mass email. If you are looking to send to a list of 25-50 people at a time, that should be no problem. If you are looking at 500, then we are not a good fit for that, which is why we have a partnership with Constant Contact, which gives you far more than just mass email. There is a load of tracking information too. If you can provide some more detail about how you would be emailing, like the number of recipients, the number of times per month you would send, etc. Anything you can think of would help me to give you the best plan.