I've recently had to delete and recreate my imap email account on my iPhone 4s.
I now have two sent folders: One marked simply "Sent" at the bottom of the screen which appears to be synched to my server "Sent" folder, and another one labelled "Sentmail." It appearst to have the 100 or so emails that I composed and sent from my iPhone the last 30 days.
When I re-established the imap account, I went to advanced settings and told it to synch my save my sent messages in the server "Sent" folder.
Just to make sure I've set up my imap account correctly, does the SentMail folder have any purpose now in my current setup?