Port 25 is not being blocked at the ISP or at the linksys. I can send mail out with no problems, but can not receive mail. Traffc _is_ definitely getting to the server on port 25. When I turn on tcpdump or ethereal watching port 25 I see inbound connections, and I see my server attempting to respond. Alexander Dalloz spent a lot of time attempting to help me debug this, doing as I had done previously from another ISP, telnetting to my server on port 25. He did not get an immediate disconnect, but it took a number of seconds. During this time, I could see via tcpdump him connecting to me, and my server attempting to respond, but he never got the ACK back from my server.
iptables is not running on the server, and sendmail is not behind tcp-wrappers. I am not aware of any routing problems, because outbound mail works fine, and all of my web pages are working fine, including Squirrelmail, CGI scripts etc. I have nothing in /etc/hosts.allow or /etc/hosts.deny, and I modified my sendmail.mc to comment out the DaemonPort options listing only the loopback IP address, then built a new sendmail.cf with make -C /etc/mail, and restarted the sendmail daemons.
Last night I uninstalled iptables and tcp-wrappers to be totally sure there is no correlation, but did not get as far as rebooting and testing some more. I had other problems with my cable modem connection and loss of all internet access for a while. I will try rebooting and testing further as soon as I get home tonight. I will take a look at your how-to doc also and see if I can pick up any possible problems from that.
From: "Rodolfo J. Paiz" <rpaiz@xxxxxxxxxxxxxx> Reply-To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx> To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx> Subject: Re: Fedora core 1 sendmail problems Date: Tue, 30 Mar 2004 08:58:46 -0600
At 13:26 3/29/2004, you wrote:I'm running a server - not a client. On the server I need to be able to both send and receive mail using SMTP on port 25 to/from other servers. I'm not catering for POP mail on port 110.
Homer,
I've lost track of what's going on here. What is your current status and problem? Are you sure it's not a network issue (firewall, router, ISP blocking the port, etc.)? Try also taking a look at the "Sendmail SMTP AUTH HOWTO" on my website [1]. While the concept is not exactly what you want, the steps shown for enabling receive from the network should work for you.
[1] http://www.simpaticus.com/linux
Only note that the sendmail.mc included there shows this line:
* define(`confAUTH_OPTIONS', `A')dnl
In reality, the Fedora installation of Sendmail has `A p' instead. Remember to remove the "p" or else it won't work; this is an error which I have regrettably not fixed yet in the document.
Cheers,
-- Rodolfo J. Paiz rpaiz@xxxxxxxxxxxxxx http://www.simpaticus.com
-- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
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