pixelated sends message, but raises error "message not sent"
The messages are sent, but a red error flashes.
33 2017-05-23T15:55:34+0200 [twisted.mail.smtp.ESMTPSenderFactory#info] Starting factory <twisted.mail.smtp.ESMTPSenderFactory instance at 0x7f4a80118998>
34 2017-05-23T15:55:34+0200 [pixelated.resources.mails_resource#error] error occurred while sending: 'NoneType' object has no attribute 'replace'
This appears to be related to the inbox being blocked and not receiving any notification.