Posielať OLO maily na ich SMTP server

[mpinter]

Credentials majú @erehulka, @mpinter a @Balros.

Požiadavka je aby sa emaily neodosielali cez mailgun ale tiekli cez OLO mail server (kde si ich vedia následne adminovať). Bude treba v prípade OLO mailov posielať cez tool ako je napr. https://www.npmjs.com/package/nodemailer

[mpinter]

How to test this - we should prefix the mail title with [TEST]. We should contact someone from OLO side (likely Dioniz) to check if they see mails coming through.

I wouldn't mind the approach of a) testing it from local dev with a mail or two and contacting them to check they see the emails and b) once that is done, having this approach only in production, in dev/staging sending through mailgun like before so that we can iterate and test the templates / data / whatever else without going through OLO.