I think it was likely due to our internal email settings. Once I created a gmail account instead and used that it worked like a charm.
That said, I have another question (and let me know if you’d prefer I create a new topic entirely):
Is there any way to ensure that the email recipients of the new topic notifications include everyone within the group it was sent to (as opposed to sending it like it seems it’s only going to one individual)?
The idea is that people will still feel like they’re replying to everyone in the group rather than having to turn on reply notifications and informing people that their respective replies will be seen by all?
Let me know if any of that is unclear.