input: Write a function to validate a list of emails. The function should return a boolean indicating whether a given email address is valid. If any email in the list is invalid, the function should return False.
  assert validate_mail_list(["example.user@gmail.com", "bad@example"])==False
  assert validate_mail_list(["john.doe@gmail.com", "jane_doe@yahoo.com"])==True
  assert validate_mail_list(["test@example.com", "another@domain"])==False
  assert validate_mail_list(["valid@test.com", "invalid@test"])==False
  assert validate_mail_list(["first.last@domain.co"])==True
output: def validate_mail_list(emails):
      import re
      pattern = r'^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$'
      for email in emails:
          if not re.match(pattern, email):
              return False
      return True