Vacancy expiration mails sent too late

Ghost User
2019-05-28T10:52:08+02:00

The email for an vacancy expiration is sent after the expiration date.

### Current behaviour

I received the following email on the 1st of march:
```
Hello!

A vacancy of Internship Capital Structuring, 'Rabobank' will expire within the next 30 days. Maybe you should contact them to negotiate a new deal.

Kisses,
The website
```

The vacancy "Internship Capital Structuring" has its expiration date set to `18-02-2018`.

### Expected behaviour
The email should have been sent on the 1st of February, not March.