Hello all,
I have a Postfix, dovcot, Mailscanner config for a mail server and it has been working fine. Now for some reason I am not able to connect to the SMTP to send mail via thunderbird. I can telnet to the device from the server telnet host.mail.com 25 and send myself an email. But when I try to telnet to the mail server from an external device (from a different ip) I am unable to get a connection. I should get a ssl certificate because I have enabled ssl and tls. When I go to my maillog file I do not see the entry for any external connections. I am not sure what to try now, any ideas?

Thanks for the read,
timgerr

Are you saying that you can connect to localhost but not from elsewhere? if so, it sounds like a firewall or port forwarding issue, but check the postfix is listening on more than localhost with

netstat -nalp | grep :25

Here is what I got:
netstat -nalp | grep :25
(No info could be read for "-p": geteuid()=500 but you should be root.)
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN -
tcp 0 0 ::ffff:72.52.242.XXX:143 ::ffff:69.216.129.XXX:2515 ESTABLISHED -


So it looks like the port is open, now what? Thanks for the help by the way.

timgerr

Most likely firewall. What's the output of

iptables -L

You didn't answer my question by the way.

Sorry about the first question. I can connect via local command line vi telnet. I can also send mail via local install of squirrel Mail. Here is my output for the command iptables -L.

[root@host ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination


Thanks for the help, mail is not my forte.

timgerr

What's the exact message you get when you try to telnet in from outside?

What are the settings in main.cf for inet_interfaces (so output of grep inet_interfaces /etc/postfix/main.cf)?