Mailchimp Transactional is simple, powerful transactional email.
Send the current design proof and mark its revision on the card.
Your reviewer gets the current image or PDF and a clear question. Your review card shows which revision you sent.
Email the current design proof to its reviewer with a decision deadline.
Your reviewer gets the current proof and a clear decision deadline by email when a card is ready for review.
Send designers the reviewed file and changes for the next version.
Your maker gets a rework email that names the reviewed proof and fixes due next.