cannot delete mail from inbox

What's the error message? So we can have more info.

Normally I would do what you did, are you sure that is not something with the Yahoo mail?

Regards,
Lucas do Monte

I think you already did this, but searching I found a guy that had the same problem and here is what he did:

1. Opened settings
2. Clicked on mail, contacts, calenders
3. Clicked on Yahoo
4. Clicked on advanced
5. Clicked on Deleted Mailbox
6. Click the "trash" button under "on my iphone" even though its already checked.

I have the same problem but none of the above worked, any pointers?

I have my email set up as an IMAP account and was getting the same "unable to move..." message. I suspected the problem for me had to do something with the trash bin on the phone and the trash bin on the server not communicating properly. I tried this and it worked for me, although from other posts, I see it doesn't work for everyone:

1. Go to "Settings"
2. Select "Mail, Contacts, Calendars"
3. Select the mail account in question
4. Select "Account Info"
4. Select "Advanced"
5. Select "Deleted Mailbox"
6. Under "On My Server", Click the "Trash" folder (or whatever your trash folder is called on your server). This should put a check mark beside it.

As far as my 3rd gen. touch goes, when I got to the 'on the server' there was no 'trash' option as you said may happen, so I tried the 'blacklist folder 1' and it seems to have worked!

Thanks very much.