[dns-operations] Curious use of cname
sysops at mail2000.us
Sun Aug 10 04:06:15 UTC 2014
@mail.china.com does provide free email service, and they have a large number of user base.
And their MX setup:
mail.china.com. 297 IN CNAME mail.china.com.cachecn.com.
mail.china.com.cachecn.com. 97 IN MX 10 mx-mail-china-com.icoremail.net.
Will some email deliver systems break due to this setup? Thanks.
Wed, 6 Aug 2014 21:31:32 -0400 from Andrew Sullivan <ajs at anvilwalrusden.com>:
>No. They're doing it by simulating it. The actual dns responses are a or aaaa records. It only works under some circumstances.
>Please excuse my clumbsy thums.
>> On Aug 6, 2014, at 21:10, Yonghua Peng < sysops at mail2000.us > wrote:
>>>> >What nameserver allows this
>>> Several, every one of which apparently has to re-learn this.
>> I saw Amazon Route53 has allowed this also. does it mean route53 is broken? thanks.
>> We are hiring cloud Dev/Ops, for more details please see:
>> dns-operations mailing list
>> dns-operations at lists.dns-oarc.net
>> dns-jobs mailing list
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