Organize this email export and draft replies to 15 important messages

I've been neglecting my inbox and have ~300 emails from the past month that need attention. Need help triaging and drafting replies to the important ones.

Tasks

• Review all 300 emails (will provide MBOX or CSV export)
• Categorize: urgent, needs reply, FYI only, spam/promotional
• Identify the ~15 most important that need a response
• Draft replies for those 15 (I'll review and send myself)
• Create summary of anything time-sensitive I might have missed

Context

I'm a freelance consultant. Emails are mix of client communication, prospects, vendors, and newsletters. Will provide context on ongoing projects so replies make sense.