diff --git a/MANIFEST.in b/MANIFEST.in
index 67ba3f8..4b9da9a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,6 +3,7 @@ include LICENSE
 include README.rst
 recursive-include validate_email *
 prune tests
+recursive-exclude tests *
 recursive-exclude * __pycache__
 recursive-exclude * *.pyc
 recursive-exclude * *.pyo
diff --git a/setup.py b/setup.py
index 0d91f15..9c73a66 100644
--- a/setup.py
+++ b/setup.py
@@ -1,30 +1,33 @@
-from setuptools import setup
-from setuptools.command.develop import develop
-from setuptools.command.install import install
+from os.path import join
+from urllib.request import urlopen
+
+from setuptools import find_packages, setup
+from setuptools.command.build_py import build_py
+
+blacklist_url = (
+    'https://raw.githubusercontent.com/martenson/disposable-email-domains/'
+    'master/disposable_email_blocklist.conf')
 
 
-class PostDevelopCommand(develop):
-    'Post-installation for development mode'
+class PostBuildPyCommand(build_py):
+    'Post-installation for build_py'
 
     def run(self):
+        if self.dry_run:
+            return super().run()
+        with urlopen(url=blacklist_url) as fd:
+            content = fd.read().decode('utf-8')
+        target_dir = join(self.build_lib, 'validate_email/lib')
+        self.mkpath(target_dir)
+        with open(join(target_dir, 'blacklist.txt'), 'w') as fd:
+            fd.write(content)
         super().run()
-        with open('/tmp/test-develop', 'w') as fd:
-            fd.write(str(vars(self)))
-
-
-class PostInstallCommand(install):
-    'Post-installation for installation mode'
-
-    def run(self):
-        super().run()
-        with open('/tmp/test-install', 'w') as fd:
-            fd.write(str(vars(self)))
 
 
 setup(
     name='py3-validate-email',
     version='0.1',
-    py_modules=('validate_email',),
+    packages=find_packages(exclude=['tests']),
     install_requires=['dnspython'],
     author='László Károlyi',
     author_email='laszlo@karolyi.hu',
@@ -32,6 +35,6 @@ setup(
     long_description=open('README.rst').read(),
     keywords='email validation verification mx verify',
     url='http://github.com/karolyi/py3-validate-email',
-    cmdclass=dict(develop=PostDevelopCommand, install=PostInstallCommand),
+    cmdclass=dict(build_py=PostBuildPyCommand),
     license='LGPL',
 )
diff --git a/validate_email/regex_check.py b/validate_email/regex_check.py
index 48648e6..a3d2154 100644
--- a/validate_email/regex_check.py
+++ b/validate_email/regex_check.py
@@ -1,4 +1,5 @@
 from ipaddress import IPv4Address, IPv6Address
+from os.path import dirname, join
 from re import IGNORECASE
 from re import compile as re_compile
 from typing import Optional
@@ -51,10 +52,24 @@ class EmailValidator(object):
 
     def __init__(
             self, whitelist: SetOrNone = None, blacklist: SetOrNone = None):
-        self.domain_whitelist = whitelist or self.domain_whitelist
-        self.domain_blacklist = blacklist or self.domain_blacklist
+        self.domain_whitelist = set(whitelist) \
+            if whitelist else self.domain_whitelist
+        self._load_blacklist(blacklist=blacklist)
 
-    def __call__(self, value) -> bool:
+    def _load_blacklist(self, blacklist: SetOrNone = None):
+        'Load our blacklist.'
+        self.domain_blacklist = set(blacklist) \
+            if blacklist else self.domain_blacklist
+        path = join(dirname(__file__), 'lib', 'blacklist.txt')
+        try:
+            with open(path) as fd:
+                lines = fd.readlines()
+        except FileNotFoundError:
+            return
+        self.domain_blacklist = self.domain_blacklist.union(
+            x.strip() for x in lines)
+
+    def __call__(self, value: str, use_blacklist: bool) -> bool:
         if not value or '@' not in value:
             return False
 
diff --git a/validate_email/validate_email.py b/validate_email/validate_email.py
index a76e88b..c17f6ca 100644
--- a/validate_email/validate_email.py
+++ b/validate_email/validate_email.py
@@ -3,7 +3,8 @@ from .regex_check import regex_check
 
 
 def validate_email(
-        email_address, check_regex=True, check_mx=True, smtp_timeout=10):
+        email_address: str, check_regex: bool = True, check_mx: bool = True,
+        smtp_timeout: int = 10, use_blacklist: bool = True) -> bool:
 
     if check_regex and not regex_check(email_address):
         return False