Mailchimp Transactional is simple, powerful transactional email.
Email the current page proof and log which revision went out.
Your reviewer gets the current image or PDF and a clear question. Your review card shows which revision you sent.
Email publication proofs to reviewers with a decision deadline.
Your reviewer gets the current proof and a clear decision deadline by email when a card is ready for review.
Email the maker the rejected publication proof and fixes due next.
Your maker gets a rework email that names the reviewed proof and fixes due next.