[Mailman-Users] Do I need an MX Record

[Jon Carnes]

In DNS you would have something like:
  lists.mlsnet.com.    A      216.216.23.43
                       MX     10  lists.mlsnet.com
                       MX     100 mail.mlsnet.com

In this scenario all mail to user at lists.mlsnet.com will be delivered to
lists.mlsnet.com.  If that server does not respond then the mail will be
queued up on your main mail server: mail.mlsnet.com

This assumes that you can setup the other mail server to act as a
secondary.  If not, then just leave it off.

And "yes" virginia, you *do* need an MX record.  If you don't have an MX
record then any mail to lists.mlsnet.com will be dumped out to your main
mail server (using your domains MX record).  You could setup some
internal routes on that server to shuffle mail over to lists.mlsnet.com,
but that would be counter to your stated intention of moving the load
away from the main mail server.

Jon Carnes
Sendmail/DNS guru

On Fri, 2003-03-28 at 12:25, Sullivan, John wrote:
> In my network I have a corporate mail server set up that handles all the
> email for mlsnet.com
> 
> I have setup the RedHat box so I can send out email to newsletter
> subscribers - I didn't want to put the heavy load on my corporate mail
> server. 
> 
> The RedHat box has sendmail on it and should be the box that handles emails
> for lists.mlsnet.com (incoming should be delivered to this box)
> Also the IP for this box is the 12.105.18.209 address referenced below.  
> 
> I have an A record setup for lists.mlsnet.com - I do not have an MX record
> setup for it though. 
> 
> How do I set the box up so it handles all email sent to @lists.mlsnet.com?
> 
> Thanks for your help.. 
> 
> -----Original Message-----
> From: Dallas Bethune [mailto:dallas at dreamhost.com] 
> Sent: Friday, March 28, 2003 12:21 PM
> To: Sullivan, John
> Cc: mailman-users at python.org
> Subject: Re: [Mailman-Users] Do I need an MX Record
> 
> 
>  From the last error there, it looks like your mail server is trying to  
> deliver mail for lists.mlsnet.com to an smtp server at 12.105.18.209.   
> I don't know what server that is, but it needs to be running an some  
> sort of smtp server to accept email.  If that is not where the email  
> should be going, then an MX record may be appropriate to point it to  
> the appropriate location.
> 
> 	Dallas
> 
> 
> On Friday, March 28, 2003, at 08:56 am, Sullivan, John wrote:
> 
> > Hi all - I am having some problems sending out emails to my lists.
> >
> >
> >
> > I have Red Hat 8.0
> >
> > Sendmail
> >
> > MailMan 2.0.1
> >
> >
> >
> > I have a test lists set up with test users.
> >
> >
> >
> > When a user subscribes to the list they get a confirmation from the  
> > mailman
> > server but when they reply there email seems to just get lost.
> >
> > When I send out an email to the list nothing gets delivered.
> >
> > My server name is lists.mlsnet.com and my list is called 90minutes and  
> > I
> > should be able to send mail to 90minutes at lists.mlsnet.com
> > <mailto:90minutes at lists.mlsnet.com>  to send an email to all of the
> > subscribers.
> >
> >
> >
> > Here is some log errors from maillog file:
> >
> >
> >
> >
> >
> > Mar 28 11:48:21 localhost sendmail[10484]: h2SGmKFc010484: from=root,
> > size=388, class=0, nrcpts=1,
> > msgid=<200303281148.20675.90minute at 90minutes.com>, relay=localhost  
> > [[UNIX:
> > localhost]]
> >
> >
> > Mar 28 11:48:22 localhost sendmail[10486]: h2SGmLjh010486:
> > from=<
> > <http://lw11fd.law11.hotmail.msn.com/cgi-bin/
> > compose?curmbox=F000000005&a=fa
> > f76a38f4023445548c138e0ad20419&mailto=1&to=root at localhost.localdomain&m 
> > sg=MS
> > G1048870350.86&start=1072965&len=2281&src=&type=x>
> > root at localhost.localdomain>, size=577, class=0, nrcpts=1,
> > msgid=<200303281148.20675.90minute at 90minutes.com>, proto=ESMTP,  
> > daemon=MTA,
> > relay=localhost.localdomain [127.0.0.1]
> >
> >
> > Mar 28 11:48:22 localhost sendmail[10484]: h2SGmKFc010484:
> > to=90minutes at lists.mlsnet.com, ctladdr=root (0/0), delay=00:00:02,
> > xdelay=00:00:01, mailer=relay, pri=30387, relay=localhost.mlsnet.com.
> > [127.0.0.1], dsn=2.0.0, stat=Sent (h2SGmLjh010486 Message accepted for
> > delivery)
> >
> >
> > Mar 28 11:49:22 localhost sendmail[10488]: h2SGmLjh010486:
> > to=<90minutes at lists.mlsnet.com>, ctladdr=<
> > <http://lw11fd.law11.hotmail.msn.com/cgi-bin/
> > compose?curmbox=F000000005&a=fa
> > f76a38f4023445548c138e0ad20419&mailto=1&to=root at localhost.localdomain&m 
> > sg=MS
> > G1048870350.86&start=1072965&len=2281&src=&type=x>
> > root at localhost.localdomain> (0/0),
> > delay=00:01:01, xdelay=00:01:00, mailer=esmtp, pri=30576,
> > relay=lists.mlsnet.com. [12.105.18.209], dsn=4.0.0, stat=Deferred:
> > Connection
> > timed out with lists.mlsnet.com.
> >
> >
> >
> > Do I need to have MX Records setup on my external DNS for this server?
> >
> >
> >
> > Your Help is Appreciated...
> >
> >
> >
> >
> >
> >
> >
> > ------------------------------------------------------
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> >
> > This message was sent to: dallas at dreamhost.com
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> > dallas%40dreamhost.com
> >
> 
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