SES to handle transactional email is completely reasonable. Doing bulk email sends using SES is asking for trouble and you'll consistently lag way behind the b

SES to handle transactional email is completely reasonable. Doing bulk email sends using SES is asking for trouble and you'll consistently lag way behind the big marketing ESPs (MailChimp, Constant Contact, Active Campaign) on delivery rates. Making sure you avoid spam traps, fraudulent signups, purchased lists, spammy campaigns and all that are most of the work. Even if your customers are internal only, what happens when one of your salespeople uploads a sketchy email list they got from who knows where. I've worked at an ESP before and you'd be very surprised how many smart people are just working on the spam detection.