My mail server (ip) is blocked by hotmail and I am getting this error to any message that are sent to hotmail users:

my system is not doing any spam activites while problem is that its only sending emails to users who put their email addresses, and some time some users put wrong address or user id.

relay=mx3.hotmail.com[65.54.245.72], delay=1, status=bounced (host mx3.hotmail.com[65.54.245.72] said: 550 Your e-mail was rejected for policy reasons on this gateway. Reasons for rejection may be related to content such as obscene language, graphics, or spam-like characteristics (or) other reputation problems. For sender troubleshooting information, please go to http://postmaster.msn.com. Please note: if you are an end-user please contact your E-mail/Internet Service Provider for assistance. (in reply to MAIL FROM command))

How to be back in the Game?

Any idea ...

Thnx

Do you have a reverse DNS lookup record for your domain? That could be what "reputation problems" refers to if you don't. There are a number of mail providers that automatically bounce any message coming from a domain that does not have reverse lookup. I know for sure that this is true of AOL, and I believe its true with hotmail.

You should be able to get around this by using your ISP as a relay. Are you using sendmail? If so, configure your ISP's SMTP server as your smart host.

BTW, you can check to see if reverse lookup actually is the problem by using some of the IP tools at http://www.dnsstuff.com/. Just scroll down to the lower half of the page in the IP Tools section (you can ignore the stuff about becoming a member, its something they've recently added and its not required).

If you reroute through a isp be aware that many (like Charter Comm) have started limiting emails to under 100/hour(last I heard).

Lazlow