Hello, I have a bad problem. Some of my clients reported to me that when they send e-mails for domains, that have mx entries that don't answer ping requests(icmp requests), the cpanel don't send e-mails and don't receive too. But i need to send these e-mails because the servers are on and the service of mail is ok. I think that exim or cpanel, i don't know, ping de domain and because don't receive the answer think that the server is out. somebody know how to solve this problem? because i don't have any idea. sorry because the english, i'm from Brazil.