What platform does clarity use for autogenerated emails? Should we be building that content and have that setup within our app programming?

My first question is, how did you get these email addresses? If they physically entered them, simply store them in an encrypted spreadsheet or database for importing into a platform. Of course, the best method is utilizing an email service to initially collect those addresses.

Treyedit.com is simple and easy

Do you have an idea of what kind of invalid emails you are receiving? That will help you determine which vendor is the best fit for you. For example do you consider support@, info@, or postmaster@ invalid, some vendors will weed those out for you? Or are you just concerned with making sure the email has an accurate Domain/MX Record? Will blocking SPAM IP addresses be enough to address your needs, if so you need a vendor who checks agains URI DNSBLs. With that in mind, here's a good blog article about the top vendors. Best wishes! https://www.formget.com/best-email-verification-services/

You need to think about these auto-responders in terms of events. If you can put data up on MailChimp when an event takes place, you can manage auto-responders off of that data. Here is some additional information from their website. http://kb.mailchimp.com/article/how-do-i-create-an-autoresponder

I have a tremendous amount of experience sending emails from new domains - perhaps 2,000,000 emails per year - and the long and short of it is this: email deliverability is tremendously complex. Why? For one thing, because of the constant battle between spammers, ISPs, ESPs and other players, among other things. Also, because email still uses some very old and outdated protocols that make this all more difficult. If your business is going to rely heavily on email, I would encourage to educate yourself now so that you won't be stymied as you grow. Many of the things I learned were through trial and error - which can be excruciatingly frustrating. Just a few of the things you should immediately begin working on: proper SPF, SenderID, DKIM compliance along with solid DNS set up. Additionally, if you will use email heavily, I would start now putting the pieces in place for later white labeling aa nd possible dedicated IP sending. In terms of the actual email content itself, that is another subject you will want to investigate. I'm not saying these things to discourage you - but rather to help you avoid the mistakes we made in the past. If you need a hand getting a little grip on this I probably can steer you in the right direction pretty quickly. Wish you the best in your endeavor! Adam