Hi seeeuu,
You cannot use the email from the embassy to get your Saudi Arabia Police Clearance. You have to wait for the request letter that they sent you on mail. Since they sent it last February6, it should be on it's way to your mailing address now. It will include 2 documents. The first one is in English that contains instructions on how to get the PCC. The second one if the Personal Information Form which is written in arabic. You have to fill up the applicant's info there in Arabic form too. You need to bring this arabic form in the Ministry of Foreign Affairs, Dammam. They will put sticker/seal on it and you have to pay 30 riyals. Then, after you get the seal, you bring that form to the police department and you will do there the finger printing. In two weeks, you will get your police clearance, you have to pick it up from the police dept. Don't forget to translate it in English.
Hope this helps.. This is based on personal experience of my husband in Saudi Arabia...