[pfx] Re: Question on the CNAME

2023-05-03 Thread Viktor Dukhovni via Postfix-users
On Thu, May 04, 2023 at 01:02:14AM +, Ken Peng via Postfix-users wrote: > I am just not sure, for this domain SpaceMail.com, who has a CNAME to > CDN for the root domain, every query to this domain will get a CNAME. > for instance, > > $ dig spacemail.com mx +nocmd +noall +answer > spacemail.

[pfx] Re: Question on the CNAME

2023-05-03 Thread Shawn Heisey via Postfix-users
On 5/3/23 19:02, Ken Peng via Postfix-users wrote: I am just not sure, for this domain SpaceMail.com, who has a CNAME to CDN for the root domain, every query to this domain will get a CNAME. for instance, $ dig spacemail.com mx +nocmd +noall +answer spacemail.com. 60 IN CNAME

[pfx] Re: Question on the CNAME

2023-05-03 Thread Sean Gallagher via Postfix-users
I am just not sure, for this domain SpaceMail.com, who has a CNAME to CDN for the root domain, every query to this domain will get a CNAME. for instance, This is a requirement of CNAME. If a domain has a CNAME, it can't have anything else. See RFC1034 3.6.2. There is a minor exception, the