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From "Jeff Keyser" <JKey...@telocity.com>
Subject RE: Newsgroup integration, and other questions
Date Sun, 19 May 2002 23:56:57 GMT
Actually, the problem isn't that James needs to lookup MX records as much as
it is that James doesn't know what DNS servers the local host was configured
to use.  If James could read the DNS configuration of the local machine,
this wouldn't need to be set again in the config.

> -----Original Message-----
> From: Chaudhuri, Hiran [mailto:Hiran.Chaudhuri@softwareag.com]
> Sent: Wednesday, May 15, 2002 5:26 PM
> To: James Developers List
> Subject: RE: Newsgroup integration, and other questions
>
>
> Hi, Danny.
>
> Thank you for that explanation. Yes, I was no longer aware of those MX
> records that need to be queried. What I thought of was only
> the hostname
> that might need resolution.
>
> Hiran
>
> -----------------------------------------
> Hiran Chaudhuri
> SAG Systemhaus GmbH
> Elsenheimerstra├če 11
> 80687 M├╝nchen
> Germany
> Hiran.Chaudhuri@softwareag.com
> Phone +49-89-54742-134
> Fax   +49-6151-9234-5134
>
> > -----Original Message-----
> > From: Danny Angus [mailto:danny@thought.co.uk]
> > Sent: Wednesday, May 15, 2002 10:56 AM
> > To: James Developers List
> > Subject: RE: Newsgroup integration, and other questions
> >
> >
> > Hiran
> >
> > > So why does a MTA by itself need to know the DNS server's ip
> > > addresses? BTW,
> > > I never entered such information and did not see any problems.
> >
> > MTA's use MX records to find a list of all MTA's to whom they
> > could deliver
> > mail for a specified domain.
> > If this list isn't found, or all of those hosts cannot be
> > contacted the MTA
> > can try to deliver directly to the domain of the address.
> >
> > Thus most mail domains actually map to servers whos name is
> > different to the
> > mail domain, in which case no DNS prevents this being delivered.
> > Some mail is correctly delivered directly to the domain.
> >
> > Java doesn't (AFAIK) have a simple method of determining MX
> > record lists or
> > the nameservers from OS network config, and local name resolution
> > (etc/hosts) doesnt contain MX information. Therefore James
> > needs to know the
> > IP of a nameserver from which it can get MX records.
> >
> > Sendmail can find the nameservers from OS config, so you
> don't have to
> > configure this parameter for it, but it isn't as portable as James.
> > Likewise, I expect, for other platform specific MTA's.
> >
> > If Java does have a way of getting lists of MX records
> > without knowing DNS
> > addresses do let us know about it.
> >
> > d.
> >
> >
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