What does “550 Service unavailable; Client host [mail-pb0-f46.google.com] blocked by zen.spamhaus.org; 174.25.119.” mean?

08. September 2013 · Write a comment · Categories: Hotmail, Outlook.com
I keep getting this message when i send certain emails, but not all the time. Help?

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.