I do not know if I am in the right area but I will ask the question anyway.

I had originally set my mail trash and sent folders preference to delete all mail after 1 week. I know that I can change it on my computer to other lengths. The problem is, my computer is finished, it died!! Now I only have my iPhone and iPad. Can this preference, to change the length of time to keep emails in a folder, be altered on my iPhone or iPad? If so, how? If not, what are my choices?

Thanks