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Help with POP3 on Linux 7.3

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by natebuck

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I have installed Redhat Linux 7.3 and configured everything the way I think is should be from all of the documentation that I have found over the internet, now POP3 works as I have tested on the local machine by typing telnet localhost 110 but when I go to a windows machine I cannot connect to POP3 but I can telnet and connect to smtp port 25, I have checked all of the books that I have at my disposal and I even went to the library to get more insite and the only info I come away with is how totest by telneting, they say just telnet to the port and you should see *whatever* but none of them say what to do if it doesn't work, Please Help !!!!!

3 replies

by justanadmin

Try checking the logs on the server to see if you see the incoming connection, and if so, see what the logs are telling you. Sometimes, the pop3 service will be blocked by default (same with telnet and a few others) and you may have to edit some files to allow access.

Also, when you try to connect from the windows machine, are you connecting to the IP address or hostname? Is the Windows machine on the same network, or is it on the other side of a firewall/router?

Try telnetting to the public IP address or hostname of your mail server rather than local host to be sure the address is correct. You can also telnet from your Windows machine command line to the ip address or host name of the mail server, just like you would on the mail server (without using localhost of course).

These things combined will help you determine where the problem is.

Good luck! Let us know your results and we'll be happy to continue helping.

by networq

You will need to do one of 2 things:

1. Redhat 7.3 comes with a firewall turned up by default. If pop3 works from localhost, then turning it off ('service ipchains stop' or 'service iptables stop').

2. Modify the firewall rules to permit access to port 110.

If option #1 works and you feel safe turning of firewall permanently, you can do so using 'ntsysv' or chkconfig.
( 'chkconfig --del ipchains' or
'chkconfig --del iptables').

If you prefer to modify the firewall to allow connections to port 110, you can run 'setup' and then choose the 'Firewall Configuration' option.

Peace

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