Hi,
It means the mail server lied to our app about having a server side folder for drafts / sent messages.
Let's make the app use only local storage for drafts / sent:
- Long press the account or go to Settings>Manage accounts and tap on the account
- Choose Options and Folders -> Folders
- Scroll to Drafts (or whatever the server calls it), it should say "Sync with [ Drafts ]" below. Tap, choose "Do not sync"
- Repeat with the Sent folder
- Back out to the main screen, try sending a new test message.
Please let me know how it works.
Nadia