Earlier quoted context omitted.
Can you click on a created task in Things and get back to the mail message in the iOS Mail app (as opposed to just seeing a copy of the message as text in the todo app the way most todo apps handle email->task connections)?
Absolutely. The links even resolve on different devices, as long as you have access to the same mail accounts.
The iPad version allows you to create tasks truly linked to emails but the iPhone version doesnt let you create them you can only open them (from what I can find, hopefully I’m wrong as I’ve been looking for this feature for YEARS and would love to make this app home)