[ryanbrunner]

The typical reason is that there's a whole host of systems that might be sending e-mail on behalf of the company, so there might be some delay (generally far less than 30 days) for it to flow through whatever integrations are set up, and hey - since there's going to be a delay anyway, why potentially shoot yourself in the foot by giving yourself less than what you're entitled to by law?

[flippyhead]

That's possible. But if DNS changes can propagate throughout the entire world in 24 hours, seems like removing my email from a bunch of Internet databases could too.

[code_duck]

Sending unwanted email to the maximum allowed by law doesn't seem like a quality business practice.

[ryanbrunner]

I'm assuming that the thought process businesses are going through goes something like:

- We have a complex series of integrations (marketing automation -> CRM system -> app -> transactional e-mail provider) (as one example) where propagation isn't real time and could take a few days (if say, each of these were propagated on a nightly batch).

- Something could go wrong with any of these.

- It's better to err on the side of caution and give a super-conservative estimate and always beat it by a huge margin, than give an accurate estimate and occasionally break it (particularly with something as sensitive as unsubscribes).