I got the error message to go away by going to Edit > Preferences > Mail Accounts > [ select my default mail account ] > 'Edit' button > 'Defaults' tab
and then setting a folder (ex. 'On This Computer' > Sent), clicking OK, and then re-doing the same thing, but un-setting the folder the second time around (by holding down the ctrl key and clicking the selected folder to un-select it) and then hitting OK again. After this, in the 'Defaults' tab it should say "Sent Messages Folder: <click here to select a folder>" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/850106 Title: Fails to append sent mail to mbox in post-processing To manage notifications about this bug go to: https://bugs.launchpad.net/evolution/+bug/850106/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs