Startup Idea: Freelance Spam Filter Solution

Startup idea to develop a software that filters spam messages from legitimate client messages on freelance job sites. The software should maintain a database of jobs that the user has bid on, and only allow messages from these clients to reach the user's inbox, thereby eliminating spam and saving the user's time.

I am a student in college currently, planning on going into the Information Technology field, and my current biggest pain is while doing online work, I often find that I can no longer distinguish legit messages on the Freelance sites I work on from the spam messages.

The way it works, is I bid on a job, and they message me later if they want me to do the job. The problem is, a lot of people are spammers and will flood my inbox saying they accept my nonexistent bid and want my information to then sell. If there was a program that would keep a database of who I actually bid on, and then verified that my new message was one of those people, it would be extremely helpful.

I would most certainly pay for a software that separated the spam messages from the real ones. This isn't email related, but it is based on my inbox on freelance sites. I know a lot of other freelancers have this issue and would pay for this as well. I have tried finding a solution to this and couldn't.

I looked for spam remover for freelancing, and many other terms but found nothing. Right now I just have to go out of my way and check their account to see if I bid on any of their jobs.