Handle socket errors

CHANGELOG.txt

@@ -1,3 +1,6 @@
+0.1.5:
+- Handle socket errors (https://docs.python.org/3/library/socket.html#exceptions)
+
 0.1.4:
 - Handle 'No MX record' exception
 

setup.py

@@ -26,7 +26,7 @@ class PostBuildPyCommand(build_py):
 
 setup(
     name='py3-validate-email',
-    version='0.1.4',
+    version='0.1.5',
     packages=find_packages(exclude=['tests']),
     install_requires=['dnspython'],
     author='László Károlyi',

validate_email/mx_check.py

@@ -1,5 +1,6 @@
 from re import compile as re_compile
 from smtplib import SMTP, SMTPServerDisconnected
+from socket import error as SocketError
 from socket import gethostname
 from typing import Optional
 
@@ -49,7 +50,10 @@ def mx_check(
         return False
 
     for mx_record in mx_records:
-        smtp.connect(mx_record)
+        try:
+            smtp.connect(mx_record)
+        except SocketError:
+            continue
         smtp.helo(host)
         smtp.mail(from_address)
         code, message = smtp.rcpt(email_address)