3 Apr
2005
3 Apr
'05
10:24 p.m.
On Saturday 02 April 2005 05:32 pm, karl@streetlampsoftware.com wrote:
How would I go about providing a good, solid *matching* ptr (as in, mail from AcmeWidget.com reflects to mail.AcmeWidget.com at x.x.x.219 ... which also happens to be mail.hostco.com) for the bazillion and one virtual-hosted email accounts on mail.hostco.com?
You wouldn't. That's not and never was the purpose of a ptr record. The ptr record is to attach responsibility for the IP#. That's done by pointing it to the hostname.
You could have multiple ptr records, but there exists no facility in any DNS or resolution system to match up ptr records with a records. If I recall correctly, behavior in the case of multiple ptr records is undefined.
Jeff
--
Jeff Lasman, nobaloney.net, P. O. Box 52672, Riverside, CA 92517 US
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