Hi,
I am facing an issuse with mail. I have one server with hostname as kk. I log in to the box as a kashyap user and send mail via mailx command like mailx -s test kashyap@yahoo.com. I recive the mail perfectly fine from address kashyap@kk.com. Now i want to send mail from yahoo to server... like
I am trying.. to send mail back to the address kashyap@kk.com. Whem i log in to the system and give mail -h command it does not show me the mail sent from yahoo to server also i do not get any undeliverable notice. Kindly help how can i do this and how can i see that mail in the box.

Any help would be appreciated.

thanks

Check your mailserver logs to see if the mail arrives at your server. Also make sure that your mailserver is listed in the MX record of your domain:

To expand on bathory's post, you need to know where the DNS MX record for your domain points. If, after using "dig" to find it out you see that it does point to your server (if not, contact your domain registrar to have them help you point it there), then you need to see why mail isn't being accepted on your machine.

Try telnetting to the machine's port 25:

telnet kk.com 25

Watch out with doing this from some DSL subscriptions, as some ISPs block port 25 from your home so the inability to connect is not actually your machine in that case. Also make sure some over-zealous anti-spam/firewall suite on your PC isn't blocking it, either.

Anyway, did that connect?

You should also be watching your machine's mail log file when you are sending mail to it. On RedHat variants, that file is /var/log/maillog. You can do this to watch it in real time:

tail -f /var/log/maillog

If you don't see any activity when you try to send mail, that port is either being blocked by a firewall on the machine or you don't even have a SMTP server running in the first place.

If you need to install a SMTP server, you can use tools like apt-get or yum to install postfix or your favorite mail transfer agent.

Do you own/control kk.com?