MX Records ?

[<shyamk@eth.net>]

I normally use Linux to receive mails  , not to send any .
And I use PINE/fetchmail on my Linux box.
  What I have done is I created a login (shyamk@localhost) of the same name as my
account at my ISP(shyamk@eth.net)  , then configured
.fetchmailrc and PINE for this login.
  It fetches the mail properly.
But , when I try to send mails I get some errors ,
(indicated below my mail) , and also some advice -
kind of message :
"Your _____ does not do resolution of email addresses.
Add MX records _____"

I do nor remember the full thing .

My doubts are :
1) Does the whole thing mean that I have to add some "MX" records
to my /etc/resolv.conf ?
2)What is  MX ?
3) How do I add these records and where ?

Well , basically I can send mails from PINE on Linux
to myself ,
and then receive it
either
in Liux (fetchmail) or
on windoze (M$ Outlook) .

So , I gather , mainly the problem is with
the
with the Mailing-lists.


Please guide me on this .

Thanks in advance.
(shyamk@eth.net)
Shyam

-------------ERRORS I GET UPON THE MAIL I HAD SENT ---------------------

--fB6C1Rk01373.1007640144/localhost.localdomain
Content-Type: message/delivery-status

Reporting-MTA: dns; localhost.localdomain
Arrival-Date: Thu, 6 Dec 2001 08:52:44 +0530

Final-Recipient: RFC822; linux-india-help@lists.sourceforge.net
Action: failed
Status: 5.1.1
Remote-MTA: DNS; mail.sourceforge.net
Diagnostic-Code: SMTP; 550 cannot route to sender address
<shyamk@localhost.localdomain>
Last-Attempt-Date: Thu, 6 Dec 2001 17:32:23 +0530

--fB6C1Rk01373.1007640144/localhost.localdomain
Content-Type: message/rfc822

Return-Path: <shyamk>
Received: (from shyamk@localhost)
 by localhost.localdomain (8.11.2/8.11.2) id fB63Mib00940;
 Thu, 6 Dec 2001 08:52:44 +0530
Date: Thu, 6 Dec 2001 08:52:44 +0530
From: shyamk
Message-Id: <200112060322.fB63Mib00940@localhost.localdomain>
To: linux-india-help@lists.sourceforge.net
Subject: /etc/inittab
Cc: guinness-list@redhat.com;debian-user@lists.debian.org;

Starting console mouse services:                           [  OK  ]
Starting crond:                                            [  OK  ]
Starting anacron:                                          [  OK  ]
ATQ0V1H0

This is what I get on VC1 after making the following changes
to my /etc/inittab , and doing  a reboot :

1:2345:respawn:/usr/local/sbin/mgetty tty1
2:2345:respawn:/sbin/mingetty tty2


I just thought , I could try out mgetty , but things stay
stuck here !

I shall be grateful for all possible help

Warm Regards,
(shyamk@eth.net)
Shyam


--fB6C1Rk01373.1007640144/localhost.localdomain--