Hi; I searc the forum but I can not find any answer or beter solutions for my problem. I installed Centos 4.4 with ISPconfig all services are working good. I have dinamic IP adress and I am using dyndns.org free domains. my domain like "myname.ath.cx" Server user can send and recive emails each others there is no problem. Like email@example.com can send and recive email from firstname.lastname@example.org Even both are can send email to other emails like hotmail or yahoo. My problem is; I can not recieve emails from other mail providers like yahoo etc. Mail log file have no any warning messages. What can I do? Thank you for your help.