Requests needs cookies for login

[justasug]

I am trying to login into my email account through a website and run an action when I get a new email (I can't use IMAP, because it's a paid feature). I use the Requests module.

I looked at the POST request Firefox made when logging in and copied the data. When I submit it and look at the response's content, it says "To access your mail.com mailbox you must enable cookies in your browser."

Can someone tell me what I am doing wrong? I checked the cookies for the Session object and it has cookies.

Here's what I have. Feel free to use the testing account information to login and inspect the POST request in your web browser and test it with Python yourself. Note: check the comments, I had to remove the https:// parts of the address out, because it doesn't let me to post "clickable links" yet, not even in code tags.
 

import requests

user = "[email protected]"
psswd = "fortesting"
# had to leave out the https part because it doesn't allow me to post "clickable links"
website = "www.mail.com"
# same for this as above
POST_url = "login.mail.com/login#.1258-header-login1-2"

# from the POST request info from Firefox's developer tools
params = {
    "service": "mailint",
    "uasServiceID": "mc_starter_mailcom",
    # same as above, had to leave https:// out for the successURL, loginFailedURL and loginErrorURL
    "successURL": "$(clientName)-$(dataCenter).mail.com/login",
    "loginFailedURL": "www.mail.com/int/logout/?ls=wd",
    "loginErrorURL": "www.mail.com/int/logout/?ls=te",
    "edition": "int",
    "lang": "en",
    "usertype": "standard",
    "username": user,
    "password": psswd
}

sess = requests.Session()
response = sess.post(POST_url, data=params)
print(response.text)