Only speaking from my own experience here, but changing the d= value (and
nothing else) usually causes catastrophic inboxing issues at gmail. None of
the other major providers seem to care. But a new d=, even just adding or
removing a subdomain, causes immediate bulking at gmail. If the mail is
> On Aug 28, 2018, at 2:46 PM, Jonathan Leist wrote:
>
> Hello,
>
> We're currently exploring the possibility of migrating from signing as the
> individual hostnames of our sending IPs to signing as the org domain aligned
> with those hostnames (e.g. signing as example.com instead of
>
