On 01/05/2018 01:34 PM, Ruben Safir wrote: > On 01/05/2018 01:41 PM, Dimitri Maziuk wrote: >> On 01/05/2018 11:49 AM, Ruben Safir wrote: >> >>> SMTPHost seems to do a non-mx record lookup for the value ... which is a >>> little strange.
>> When you look up >> an MX, you can look up an MX for a *domain*, *or* you could look up an >> MX for a *host*. > > NO NO NO > > You are looking up a host. You can do that with a domain name, or a > specific host name, but you are looking up for a HOST, or more than a > single host with rankings, with a specific ip addresses. I think you are confused: I am not talking about what you get back, I am talking about what you ask *for*. You can ask for an MX record for *FOOHost*. You can ask an MX record for FOOHost's *domain*. They are *not the same* MX record and there is no mechanism to return the latter if you ask for the former. When you are *looking up a host*, you are asking for A/CNAME. That's a "non-mx record lookup" which you find "a little strange". It isn't. -- Dimitri Maziuk Programmer/sysadmin BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu
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