BIND started replying to queries for .com with .COM

[Phil Mayers]

On 30/03/2016 13:32, Mark Andrews wrote:

> That said anything matching ownernames should be doing this case
> insensitively.

Absolutely. In our case it was something a little more subtle - the app 
(Exim) was actually looking for case-changed replies and altering its 
input to match, which under certain conditions causes very peculiar 
looking things to happen (recipient email addresses change case in logs, 
for example)

I'm moderately curious whether there are cases (pardon the pun) where 
case-mutation of a CNAME RHS might, for example, cause a Kerberos ticket 
request to fail or similar - so not strict "comparison" situations, but 
things which are more response-content aware.

Given what Tony Finch just noted about the root, I don't suppose you'd 
care to comment on those behaviours ;o)