Hi there.

I seem to have a problem with my postfix install on my Linode http://koop.hk. I followed all the steps in the tutorial: http://library.linode.com/email/postfix ... 0.04-lucid

I can send emails to it locally from the shell using mailx info@koop.hk and it receives it OK. I also set up mac mail to connect to the IP address on port 995 and it retrieves the email OK.

The problem however is that when I try to send emails to info@koop.hk externally (e.g. from gmail) they don't arrive. I'm also unable to send emails from mac mail, trying the configuration shown here: https://skitch.com/michielwaaijer/ritif/mail

Could something be wrong in the mx records for koop.hk ? - the config is shown here: https://skitch.com/michielwaaijer/riu23/my-account

Anyone know what could be the solution here?

Thanks a lot in advance!

Your MX record looks OK. Your server is currently refusing connections on port 25.

_________________
/ Peter

Hi thanks for the reply!

I can't seem to figure out how to enable port 25 on Ubuntu. I tried to add it to IP tables like below:

root@plato:~# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere tcp dpt:smtp
ACCEPT udp -- anywhere anywhere udp dpt:25

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

however to no avail. I have also tried to add the port to 58 in master.cf in the postfix config like below:
smtp inet n - - - - smtpd
58 inet n - - - - smtpd

But I still can't connect via telnet through either 25 nor 58. I can however connect through port 995 - is it possible to use this port instead?:

wire$ telnet mail.koop.hk 25
Trying 66.228.32.238...
telnet: connect to address 66.228.32.238: Connection refused
telnet: Unable to connect to remote host
wire$ telnet mail.koop.hk 58
Trying 66.228.32.238...
telnet: connect to address 66.228.32.238: Connection refused
telnet: Unable to connect to remote host
wire$ telnet mail.koop.hk 995
Trying 66.228.32.238...
Connected to mail.koop.hk.
Escape character is '^]'.

What does netstat -tulpen | grep 25 return?

It returns the following:

tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 0 891354 6252/imap-login
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 0 891353 6252/imap-login
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 0 1101513 29618/master

Postfix is only listening on 127.0.0.1, you need to edit /etc/postfix/main.cf and set

inet_interfaces = 127.0.0.0/8

to

inet_interfaces = all 

then restart postfix

service postfix restart

_________________
Paid support
How to ask for help
1. Give details of your problem
2. Post any errors
3. Post relevant logs.
4. Don't hide details i.e. your domain, it just makes things harder
5. Be polite or you'll be eaten by a grue

thanks a lot, that solved it.

Actually the inet_interfaces was set to loopback-only - I changed it to all and than it worked.

Cheers!