On Thu, Sep 07, 2000 at 06:09:31PM +1100, Craig Sanders wrote: > nobody's telling anyone to get any particular ISP or that they have to > pay for a premium quality service.
True. > it's simple - if you want a service that's worth having, you pay > whatever it costs. if you don't want that, then pay for a cheap/crappy > service and put up with it without whining. Eh? > (that said, i don't believe that missing reverse DNS is a good > reason for bouncing mail. a "450 try again later" response is more > appropriate, to cope with temporary dns outages. bouncing mail from > nonexistant domains, however, is a different story - it's almost > certainly spam and there's no point in accepting a message which > doesn't have a valid reply address so just bounce it) Ouch. I think debian developers should have a better understanding of DNS. [1] A mail domain does not have to have a valid IP address. As a default, if you use a mail domain for which there's no mail exchange, the default is to look for a host address with that name. But that's just the default. [2] A PTR record does not have to contain *any* information whatsoever. Imagine the mail client at 1.2.3.4 initiates an smtp session with your system. Your mail server performs a PTR lookup and gets back 4.3.2.1.in-addr.arpa. It then performs an A lookup and finds that 4.3.2.1.in-addr.arpa has the address 1.2.3.4. What have you learned? -- Raul -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
