sending e-mail to yahoo and hotmail.com

[mexus]

I followed this guide Virtual Users And Domains With Postfix, Courier And MySQL (CentOS 5.1) http://howtoforge.com/virtual-users-...ysql-centos5.1.

My ISP made me a PTR record (reverse dns)
My domain is mexus.org (the ptr is mail.mexus.org <=> 85.11.172.153).
But the e-mail i sent is identified like spam in yahoo, and i cannot recive it in hotmail.com.
The main bulgarian webmails doesn't identify it as spam so as gmail...

How to set up the mailserver properly so that my e-mail isn't recognized as spam?

[edge]

Do a search on this forum for 'hotmail".

http://www.howtoforge.com/forums/sho...hlight=hotmail
http://www.howtoforge.com/forums/sho...hlight=hotmail
http://www.howtoforge.com/forums/sho...hlight=hotmail