nixCraft

Hello,

I have a linux box running Fedora Core 4 as a web/email server (webserver works great). I am having problems configuring the email server. I am using postfix, dovecot, and squirrelmail. I am able to send messages from both outlook and squirrelmail to any email address as my ISP is filtering port 25 and I have configured postfix to just use my ISP's outgoing mail server.

My problem is my mail server isn't recieving mail from outside domains (I can send and recieve mail with addresses @mydomain.com). I have tried to connect to the mail server with outlook express and It won't connect, unless I point the incomming mail server to the private IP address of the server. Below is the error message that I get.

"The server responded with an error. Account: 'email.mydomain.com', Server: 'xxx.xxx.xxx.xxx', Protocol: POP3, Server Response: '-ERR Cannot connect to POP server xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx:110), connect error 10060', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC90"

My router is forwareding ports 25 and 110 to my server, no other firewall exists on my network.

Sounds to me that my postfix config file needs some tweaking. Any help will be greatly appreciated.

Thanks in advance!!!

Hmm..

Are you sure your port forwarding is working fine?

Here is how you can verify that server port 25 and 110 are open. Login to server and type the command:
If output is as follows then server port are open (or paste your output here):
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 6342/master
tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN 6342/master

Next make sure firewall rules are correct or fw does not exists:
If both of above results are positive it means your port forwarding is not working. Let me know... else will see your postfix/pop config issue.

Thanks for your reply. Below are the commands you have asked for. Looks like everything is ok. From work today I was able to telnet and get a response on port 110 from the Dovecot server. So I believe that the forwarding is working.

Do you need me to post my postfix config file?

This problem occurs because the POP3 service and/or IMAP4 service are turned off or not accessible from desktop system.

Do you need me to post my postfix config file?

No. This is incoming mail problem i.e. dovecot server and not Postfix. So you may need to post dovecot config file:

Can you telnet from windows xp server port 110 ? Click on Windows XP Start > Run >

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Yes I can telnet on port 110 to my server.

The following link is to my dovecot conf file. I made very few changes (if any to this file) Thanks for your help!

http://www.mattclark.biz/dovecot/dovecotconf.txt