Hi, You would have to use something like a box trapper. This would only allow white listed email addresses to make it through the to the recipients. However, I do not think that this would spot someone from spoofing an email address. For that you would have to do some kind of PTR check to see of the email actually came from the email server that the DNS record claims is the email server for that domain.
Sincerely, Mike -- Mike Brandonisio * Web Hosting Tech One Illustration * Internet Marketing tel (630) 759-9283 * e-Commerce [EMAIL PROTECTED] * http://www.jikometrix.net JIKOmetrix - Reliable web hosting On Jul 18, 2006, at 11:31 AM, siva sankar wrote: > Hii..! To all the group members. > > I am new to this group, I have doubt in mailserver , > My question is: > How to block spam without using any extra > antispam > packages ? > I am using RHEL4.Please help me. > > Many Thanks > Siva > > > [Non-text portions of this message have been removed] > > > > > > > ------------------------ Yahoo! Groups Sponsor -------------------- > ~--> > Yahoo! Groups gets a make over. See the new email design. > http://us.click.yahoo.com/XISQkA/lOaOAA/yQLSAA/0XFolB/TM > -------------------------------------------------------------------- > ~-> > > To unsubscribe from this list, please email LINUX_Newbies- > [EMAIL PROTECTED] & you will be removed. > Yahoo! Groups Links > > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> See what's inside the new Yahoo! Groups email. http://us.click.yahoo.com/2pRQfA/bOaOAA/yQLSAA/0XFolB/TM --------------------------------------------------------------------~-> To unsubscribe from this list, please email [EMAIL PROTECTED] & you will be removed. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/LINUX_Newbies/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
