Add "How to trigger lambda function when an email received through SES"

[ZooeyMiller]

With regards to dwyl/apprenticeship#13 (comment) we want to add a section to this repo explaining how to trigger a lambda function when an email is received with SES.

[finnhodgkin]

Walkthough: https://aws.amazon.com/blogs/aws/new-receive-and-process-incoming-email-with-amazon-ses/

[ZooeyMiller]

In order to set up SES we need to have a domain to use. I've been meaning to get one for a personal website for a while so am sorting that out through namecheap right now.

[ZooeyMiller]

there has been a problem with namecheap double charging me and not giving me the domain so currently dealing with their support chat to try and get this sorted, as as far as I understand it is a prerequisite for setting up SES.

EDIT: all sorted now

[ZooeyMiller]

Having updated the DNS records on my domain we're now waiting for them to be verified by Amazon which it says can take up to 72hrs, so we pretty much have to wait on that.