I have an email server running on Fedora Core 7 version 8.13.14. The server is working fine, but i have a problem with one of our networks in other city.
If connect to the server via Telnet from that network and type ehlo, i received a message saying "customer-xxx-xx-xxx-xx.somedomain [xxx.xx.xxx.xx] (maybe forged), pleased to meet you"
Then the problem is that no matter what computer or account im trying to send from does not work. If i put the network on SPAM CONTROL (access), the address can send emails to external accounts like hotmail, yahoo, but not local delivery, i don't receive any bounce back messages from the server. I searched on google and experts-exchange, and it seems to be a problem with dns, i also checked my domain and ip address on dnstuff.com, and it seems to be ok, th ptr points to my mailserver.