I'd like to know a bit more about sending emails with Google Apps instead of something like Mailchimp, specifically how automated you can get, what tools are av

I'd like to know a bit more about sending emails with Google Apps instead of something like Mailchimp, specifically how automated you can get, what tools are available, and what the risks are. It sounds like a good idea in theory but you presumably run the risk of getting blacklisted for SPAM if you're not careful so I'll assume this only works for businesses with high touch customer processes / fewer signups who don't need to send a whole ton of emails.