import urllib.parse, http.client
useragent = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
auth = urllib.parse.urlencode({'page':'','post':'','login_from':'','Login':'user.from.tests','Domain':'mail.ru','Password':'Qwerty123'})
conn = http.client.HTTPConnection('auth.mail.ru')
conn.request('POST', '/cgi-bin/auth', auth, useragent)
print(conn.getresponse().read().decode('utf-8'))
conn.close()

import urllib.parse, http.client
useragent = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
auth = urllib.parse.urlencode({'page':'','post':'','login_from':'','Login':'user.from.tests','Domain':'mail.ru','Password':'Qwerty123'})
conn = http.client.HTTPSConnection('auth.mail.ru')
conn.request('POST', '/cgi-bin/auth', auth, useragent)
print(conn.getresponse().read().decode('utf-8'))
conn.close()