Extraction from Email and attachments using Rule based extraction approach

Thanks @Jayavignesh_G
So the problem is I am restricted to use rule based approach only, can not use ML modeling as per the project requirement.

Refer below concerns if you can clarify will be grateful,

  1. We are extracting data through emails, is there any way if we can use email body and attachments (if there are any) because for classification I am thinking to use both
  2. I have gone through till extraction part into excel, how we can pass it to validation center ( in my understanding we can only pass pdf so should we convert both email & attachment into pdf first and if yes then how )

Thanks
Mohan Singh