Microsoft Outlook is a web-based suite of webmail, contacts, tasks, and calendaring services.
Log emailed review decisions on the matching creative card.
Your review cards show who made a proof decision and which file they saw. The reply time stays with the decision.
Put reviewer feedback on the maker's card as a proof-specific checklist.
Your maker gets a clear fix list on the matching card, tied to the marked proof from the reviewer's email.