Re: [K12OSN] Strange email issues

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On Fri, 25 Apr 2003, Shawn Iverson wrote:

>Greetings,
>
>I have a class with two K12LTSP servers (one with RH8 and the other with
>RH9) set up with several thin clients up and running.  We are able to send
>mail (using either sendmail or postfix) out over the internet to email
>accounts pretty much anywhere, but we cannot receive email.  The imap RPM
>has been installed, and IMAP is on in xinetd.  (verified this by typing
>chkconfig --list imap)  Using Evolution, we can log into the IMAP server
>when receiving mail, but no mail ever arrives.  We have also tried using
>POP3 and Netscape Mail to make sure the email program or IMAP was not the
>source of the trouble.

>Any suggestions?

SMTP (port 25) is firewalled off by default.

Edit /etc/sysconfig/iptables and copy this line:

	-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 22 --syn -j ACCEPT

and edit the copied line so that it reads:

	-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 25 --syn -j ACCEPT

and restart iptables:

	/sbin/service iptables restart

-Eric



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