evolution error: mbox sent folder invalid URI

Solution 1:

Check out:

If the error message "Your message was sent, but an error occurred during post-processing. The reported error was "Failed to append to mbox:///home/user/.local/share/evolution/mail/local#Sent: Cannot get folder 'Sent': folder does not exist. Appending to local 'Sent' folder instead."." is shown, you can fix the problem by editing your default folder settings:

Edit > Preferences > Mail Accounts > Edit > Defaults > Folder for sent messages.

This bug is fixed in Evolution versions higher than 3.0.2 (stable s> eries) and 3.1.3 (unstable development series). If this is not the case, please add a comment to the corresponding bug report.

Basically says to edit the mail account / default tab and setup the sent (and probably drafts) folder location.

• https://live.gnome.org/Evolution/FAQ#Error_message_.22Failed_to_append_to....22_after_sending_message