Imposible to connect to port 25

[danny.sierra@omtech.net]

Hi guys, i got a big problem i upgrade my zimbra to 5.0.2 open source but since then i can't send mails through smtp on port 25, i tried inside my lan where is connected my server and it's ok, it i do a telnet to port 25 i got zimbra, but if i go out of the office i got the error cannot connect to smtp and with i telnet port 25 connection is refused, i check on my firewall, and find out that port 25 is wide open, i don't know where else to look, any help? i got a zimbra 5.0.2 open source wich was 4.5.6 open source before, on a suse 10.1, i'll apreciate any help

[phoenix]

If all the services are running and you're able to connect to port 25 on the LAN then you must have something blocking port 25 - a firewall. SElinux, a router (NAT) or your ISP.

[danny.sierra@omtech.net]

well if it is not my firewall, so i'm gonna check on my ISP, it's weird because it worked before, is there anything else i could check while my isp check my port? thanks a lot for your help

[phoenix]

Are you absolutely certain that you haven't enabled AppArmor during an operating system update? Is the firewall on the Zimbra server itself?

[danny.sierra@omtech.net]

Well i'm sure of it because i had a problem before with apparmor and i disabled like a month before, about firewall, my firewall is in other server and as i told you i had access to port 25 before, i checked and re-check on the firewall before anything, also i have disabled firewall on my zimbra server that's why i'm lost on this :s

[phoenix]

Can you send me details (via PM) of your server address so I can check it from here?