dkim_instructions.txt

These are the instructions I followed to ensure the DKIM (for preventing emails being flagged as SPAM) setup worked for this system.

First, install the relevant module: "npm install nodemailer-dkim -save"
Doco: https://github.com/andris9/nodemailer-dkim

Generating the public and private keys
======================================
using openSSH I then generated a private key:
openssl genrsa -out default.squareevents.org.pem 1024 -outform PEM

I then generated a public key:
openssl rsa -in default.squareevents.org.pem -out dkim-public.pem -pubout -outform PEM

I then placed default.squareevents.org.pem into the chromis project folder.

The data in the dkim-public.pem file looked a bit like this:
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCj9m6YIyEcdrC4iH86xRWnKyRl
Q/TrK737UKDpbcVQOflYUpsLTaiWjxCNzM//DliX4s3pLBf84QuLXD/n/l6hVeAx
Wr32Ba9Ib+xmmK+S0rgqMdwev35+Ei3ImYccADLxkO1IRA1MrwjU++jRkL85ofW7
K0IkWniV3Z4H3S5UXwIDAQAB
-----END PUBLIC KEY-----

So I pasted the relevant bit into a TXT record in the DNS like this:

v=DKIM1; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCj9m6YIyEcdrC4iH86xRWnKyRl
           Q/TrK737UKDpbcVQOflYUpsLTaiWjxCNzM//DliX4s3pLBf84QuLXD/n/l6hVeAx
           Wr32Ba9Ib+xmmK+S0rgqMdwev35+Ei3ImYccADLxkO1IRA1MrwjU++jRkL85ofW7
           K0IkWniV3Z4H3S5UXwIDAQAB

for default._domainkey.squareevents.org

The code itself
===============
I then create my own transporter to use the DKIM plug-in:

See api/services/Email.js for code