Critical, phone not stoping for calling : pop3 before smtp not working

I have a new server, install centos, made a migration for all domains,
everything seems to work fine, yesterday at night went to production.

Today:
root@elcartero [/var/log]# ll | grep maillog
-rw------- 1 root root 0 May 21 04:02 maillog
-rw------- 1 root root 28664147 May 22 17:14 maillog.1

root@elcartero [/var/log]# ll | grep mess
-rw------- 1 root root 0 May 21 04:02 messages
-rw------- 1 root root 2297003 May 22 17:15 messages.1

see maillong with 0 ? and messages? you made a tail -f with those files and any entry
pop before smtp is active

you see any pop3 log :S

then:
root@elcartero [/var/log]# ll /etc/ | grep relayhost
-rw-r--r-- 1 root root 83 May 22 02:51 relayhosts
-rw-r--r-- 1 root root 0 May 22 02:51 relayhostsusers


any ideas? seems that work before, then something hapend

urgent ideas... thanks people

 

thanks

appers that was the problem

best best regards