There are places in the documentation that seem to have conflicting information for the custom domains setup.
Namely these the following locations:
On one page, it uses `autodiscover` and `_autodiscover._tcp`.
On the other page, it uses `autoconfig` and `_autodiscover._tcp`.
Here, it tells us to use CNAME for DKIM on one and that using TXT records is deprecated, but on the other it tells us use TXT records.
Could this please be cleaned up?