create bulk email cleaner

I will provide a page on my home server for you to test the script. The file upload needs to be a .csv file with commas, tabs or semicolons for delimiters. The online script is run from a linux server on a residential connection. Most email servers block connections from residential accounts, however, running this script from a linux server at a hosting provider would solve that problem. The test script is also shuts down after 100 email tests. The limitation of the script I deliver to you would be limited only by upload file size restrictions. I will edit this comment when I get the script working and ready for use in a few hours.

Validating email addresses is a rather difficult task. If you will solve it directly, soon your IP address and email address will be blacklisted by mail servers. The more that you want to check a large number of addresses. We provide professional services to verify email address. If you are interested, I can give you the link.

Hi, I am a student who is good at coding in python and I have done lot of projects similar to this. I don't understand how to verify the email,,and how to check domain exist,,,for domain existing we can open the domain one by one and check if it exist by using python mechanize library to open the URL and I don't understand how to check whether email exist. please message me if interested with details and finally I can create a windows executable. If given the task to me I will finish it with perfection and submit it to you before deadline

Hello, my name is Roman. I have a big experience with php, more then 8 years. And I have real experience with this task. We have email base with more than 350k email addresses. But I need to know what kind of system you use (framework, cms or some thing else)