[ryan29]

It may make sense to put bulk email on a completely separate domain anyway, so then you could do something like:

    example.tech
    exampletech.com

That has it's own downsides if it confuses your users, but most email clients barely show sender addresses any more, so a lot of users may not even realize you're emailing from a different domain than you use for your website.

[eastbound]

Doing support, if customer has subscribed for example.com, we will not associate support requests from @example.tech as legitimate…