Fix my domain for gmail and yahoo can be accept

I am looking for an expert in configuring domain setup to help me fix my domain. Specifically, I need to delist from the block list and set up the configuration so that emails sent from Gmail and Yahoo can be accepted. My current setup is general and I need the maintenance to be done on a short-term basis, less than one month. The freelancer should be highly knowledgeable in this area and able to complete the task promptly and accurately.