When you are sending a message email from webmail using Horde. An error message appeared:
( The folder “Sent” was not created. This is what the server said: Client tried to access nonexistent namespace. (Mailbox name should probably be prefixed with: INBOX.)
- Click Option on the left of the page then click Mail.
- Click Personal Information.
- At the bottom of the page, check the box “Save sent mail?“.
- Choose Sent at “Sent mail folder”.
- Click Save Options.
The next sent messages will save at the sent folder.