Hi, i'm kinda new to mac, but i just updated my macbook pro to OS X Leopard, and since i did that i found that i was not able to delete messages in Mail. it kept saying that there was an error connecting to the server, although i hadn't changed any server settings, and it worked fine in Tiger.. Finally i just put the unwanted messages in the "trash - on my mac" folder. but now i get this message : "Some actions taken while the account "myAccount" was offline could not be completed online Mail has undone actions on some messages so that you can redo the actions while online. Mail has saved other messages in mailbox “On My Mac” in “On My Mac” so that you can complete the actions while online. Additional information: The IMAP command “APPEND” (to Drafts) failed with server error: Invalid mailbox name.." - and then I'm stuck, i press okay and it just pops up again!! and finally the application quits unexpextedly. And it doesn't help to relaunch it several times I have no idea how to fix this. Can i force reconfigure mail or reinstall it??