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From "Steve Short" <ssh...@postx.com>
Subject RE: Lots of twisty, er, servers all the same ...
Date Tue, 20 Aug 2002 15:38:12 GMT
Not sure about this, but they may be doing some kind of load balancing.
I'd suggest not condensing the MX records based on IP address.

Steve

> -----Original Message-----
> From: Noel J. Bergman [mailto:noel@devtech.com] 
> Sent: Monday, August 19, 2002 8:48 PM
> To: James-Dev Mailing List
> Subject: Lots of twisty, er, servers all the same ...
> 
> 
> As you can see from the nslookup of ATT.NET that follows, 
> they have lots of MX records, all the same IP address.  On 
> nights like tonight when AT&T is jammed, this can block a 
> delivery thread for over an hour.
> 
> Is there a reason why getMailServers [actually, 
> DNSServer.findMXRecords()] should not return a collection 
> containing only one entry per IP address?
> 
> 	--- Noel
> 
> > set q=mx
> > att.net
> Server:  MACU.MA.MT.NP.ELS-GMS.att.net
> Address:  199.191.145.136
> 
> att.net MX preference = 5, mail exchanger = gateway1.att.net 
> att.net MX preference = 5, mail exchanger = gateway2.att.net 
> att.net MX preference = 5, mail exchanger = gateway3.att.net 
> att.net MX preference = 5, mail exchanger = gateway4.att.net 
> att.net MX preference = 5, mail exchanger = gateway5.att.net 
> att.net MX preference = 5, mail exchanger = gateway6.att.net 
> att.net MX preference = 5, mail exchanger = gateway8.att.net 
> att.net nameserver = ohcu.oh.mt.np.els-gms.att.net att.net 
> nameserver = macu.ma.mt.np.els-gms.att.net att.net nameserver 
> = orcu.or.br.np.els-gms.att.net att.net nameserver = 
> wycu.wy.br.np.els-gms.att.net
> gateway1.att.net        internet address = 204.127.134.23
> gateway2.att.net        internet address = 204.127.134.23
> gateway3.att.net        internet address = 204.127.134.23
> gateway4.att.net        internet address = 204.127.134.23
> gateway5.att.net        internet address = 204.127.134.23
> gateway6.att.net        internet address = 204.127.134.23
> gateway8.att.net        internet address = 204.127.134.23
> ohcu.oh.mt.np.els-gms.att.net   internet address = 199.191.144.75
> macu.ma.mt.np.els-gms.att.net   internet address = 199.191.145.136
> orcu.or.br.np.els-gms.att.net   internet address = 199.191.129.139
> wycu.wy.br.np.els-gms.att.net   internet address = 199.191.128.43
> >
> 
> 
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