The mail alias is most likely handled by WMF-Office-IT (via Zendesk) as @Dzahn worked on getting most of these into google groups and I couldn't see it in puppet exaim files.

WMF-Office-IT directed me here to ask SRE

I don't know how public Zendesk tasks are, but here's the link to the relevant request:
https://wmf.zendesk.com/requests/10348

Hi @Slaporte could you approve this request?

@CRoslof @Peachey88 It's true about most of the aliases moving to OIT, but dns-admin@ is one of the few that will actually stay with operations, so you are right here on phabricator in this case. And yea, the zendesk tickets aren't public afaict.

In T130790#2148713, @Dzahn wrote:

Hi @Slaporte could you approve this request?

Hereby approved.

@Slaporte thanks!

@CRoslof done! you have been added to dns-admin@