AllMail is a jailbreak tweak that adds a variety of “mass edit” options to the stock Mail app. For instance, you can select all, delete all, and even hide all emails in one swift motion.
We previously looked at AllMail when it was initially released, but it was brought to our attention that we had never created a video walkthrough of the tweak in action.
I have to say that while my experience was generally good, I did notice a few crashes here and there when using the hide mail option. Your mileage may vary.
If interested, AllMail can be purchased on Cydia for $1.50. Let me know what you think about it in the comment section below.