Hi,
we recently changed mail servers from a "shared" IP to a dedicated IP for our domain about 3 weeks ago.
Since this move, we have been blacklisted by Brightmail Filters & www.messagelabs.com/support.
SMTP error from remote mail server after initial connection:
host cluster6.us.messagelabs.com [216.82.254.19]:
501 Connection rejected by policy [7.7] 9606, please visit www.messagelabs.com/support for more details about this error message.
SMTP error from remote mail server after MAIL FROM: SIZE=5986:
host mx3.hotmail.com [65.54.188.110]: 550 OU-002 (BAY0-MC3-F23) Unfortunately, messages from X.X.X.X weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
Microsoft (hotmail/live/outlook) have kindly removed this block from their filters and noted that we were being blocked based on the the recommendations of Symantec's Brightmail filters.
However the message labs filters remain in place. I've attempted to arrange other IT Support people to contact Message Labs on our behalf (big companies) but they have had no luck either.
We are a small company and do not SPAM, probably send about 150 emails a week (amongst 10 staff) but have been wrongly blocked.
Any help would be appreicted.
regards,
James