We often collect the email addresses of between 30-50 potential customers at wedding fairs to arrange follow up consultations. Up until now we've had a generic text email which we send out as a follow up and to arrange bookings but they look a bit bland and our mail server only allows a few emails to be sent at once so it takes a long time. We're looking at building an HTML mail shot through mailchimp to make things more visually interesting for the recipient but with each email potentially being worth a lot of money, I'm concerned that theyll get stopped by spam filters simpy because they come from mailchimp and /or contain HTML. Am I right to be concerned? Is plain text the better option for this kind of bulk email?