Discover the dns server only once

gzqichang · Apr 8, 2014 · 5599863 · 5599863
1 parent 892f864
commit 5599863
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/validate_email.py b/validate_email.py
@@ -25,6 +25,7 @@
 try:
     import DNS
     ServerError = DNS.ServerError
+    DNS.DiscoverNameServers()
 except ImportError:
     DNS = None
 
@@ -123,7 +124,6 @@ def validate_email(email, check_mx=False, verify=False, debug=False, smtp_timeou
             if not DNS:
                 raise Exception('For check the mx records or check if the email exists you must '
                                 'have installed pyDNS python package')
-            DNS.DiscoverNameServers()
             hostname = email[email.find('@') + 1:]
             mx_hosts = get_mx_ip(hostname)
             if mx_hosts is None: