Bulk Email Marketing List Cleaning 50000 Records

I am looking for a bulk email professional that would be able to clean a small list of 50000 records. ALL BOUNCES AND SPAM TRAPS must be removed. The list is only few months old. It is a purchased list showing the opt in dates etc. It is NOT a scraped list. Please outline the following: - what is your procedure for removing spam traps - what is your procedure for removing bounces. - how quickly can you get the job done - Provide proof/backup for the fact that the list is clean (list of bounces and traps and how you derived it). I want to work with someone professional, that will answer ALL my questions and concerns in a timely manner. Even though this is a small list, if this send test gives the expected results, i will be purchasing approx 250000 records per month for mailing. These records will need to be cleaned so there is a lot more work if you do a FANTASTIC job. Also, if you have bulk email marketing skills to get email in the inbox and know all about deliverability, do let me know this , as i will be looking at scaling very soon and will also need help in this field. I can assure you that if you are reliable and professional i will have a lot more business for you very soon. If you have questions about the list, let me know. I look forward to hearing from you.