Re: Sendmail config problems (mail to remote hosts bouncing)

[Luke Kyohere <luke at eahd.or.ug>]

Thanx.... your post proved helpful, apparently that domain has not yet
updated its MX records to include the host in question.

Thnx again.

Rgds
KL

On Wed, 4 Dec 2002, Brian Candler wrote:

> On Wed, Dec 04, 2002 at 06:12:36PM +0300, Luke Kyohere wrote:
> > Hello, I am having a problem sending mail to a host
> > machine host.someplace.com. where someplace.com is not my domain:
> >
> > eg Mailto: user at host.someplace.com
> >
> > Somehow my MTA (sendmail) cannot seem to resolve the host
> > machine and it returns an error:
> >
> > Name service error for host.someplace.com
> >
> > and yet mail for user at someplace.com has no problem being sent.
>
> Try querying the DNS yourself: sendmail would try to look for an MX record
> followed by an A record, so you can do:
>
> $ nslookup -q=mx host.someplace.com.
> $ nslookup -q=a host.someplace.com.
>
> If you get DNS errors back, then it's a DNS problem at someplace.com
>
> > I would have expected that my MTA would forward the mail to someplace.com
> > which would then send it to host.someplace.com. This way my machine does
> > not need to know about all the hosts at every domain. (I would have
> > thought).
>
> No. It doesn't know the difference. If you try to mail to user at any.where,
> sendmail will first try to find MX records for 'any.where', and will use
> them if they exist. If not, as a fallback it will try to find A records for
> 'any.where'. If not, it should bounce.
>
> Regards,
>
> Brian.
>
> -----
> This is the afnog mailing list, managed by Majordomo 1.94.5
>
> To send a message to this list, e-mail afnog at afnog.org
> To send a request to majordomo, e-mail majordomo at afnog.org and put
> your request in the body of the message (i.e use "help" for help)
>
> This list is maintained by owner-afnog at afnog.org
>


-----
This is the afnog mailing list, managed by Majordomo 1.94.5

To send a message to this list, e-mail afnog at afnog.org
To send a request to majordomo, e-mail majordomo at afnog.org and put
your request in the body of the message (i.e use "help" for help)

This list is maintained by owner-afnog at afnog.org