One error in outbox blocks all messages from being sent
I hadn't noticed an error while sending an e-mail a few days ago, so it remained in my outbox, with Geary unable to send it. So far, so annoying.
What's even more annoying is that mails that could've successfully been sent, did not leave my outbox. It seems like one error in the outbox blocks all messages from being sent. This should not be the case.