I have mail server in sme 7.5 linux
my domain is domain.sa
External ip is
78.93.xxx.xx
dns is
212.93.xx.xxx
Recieve is ok good
send is late may be 5 hours to reach to outside domain(gmail-yahoo-hotmail)
why
my settings of sme server fixed from 5 years not changed
before one week until now
I notice that when i send email from my domain to outside domain
it late too much time
what happen i dont know
Can you help me in solving this problem if possible

also status of internet in mail server is succefully access