Commit aa1617e creates issues when creating a new email where context is also set.

[gabn88]

In my case I do always set the context, but I also leave template sometimes empty.

Then the "fix" in commit aa1617e creates an error:

AttributeError post_office.tasks.send_queued_mail
'NoneType' object has no attribute 'subject'


on line 
            subject = engine.from_string(self.template.subject).render(self.context)

[selwin]

Mind opening a PR for this?

[gabn88]

@selwin Sorry for the slow response. Using an older version for now. This is however still a problem in the latest master.