Email and Spam

I don’t remember what linked me here, but this is an answer page from Google about email and spam handling. An excerpt is below to see their explanation of how all 3 are necessary

To minimize the chance that your messages are marked as spam, set up these authentication methods:

Publish an SPF record for your domain. SPF prevents spammers from sending unauthorized messages that appear to be from your domain.
Turn on DKIM signing for your messages. Receiving servers use DKIM to verify that the domain owner actually sent the message. Important: Gmail requires a DKIM key of 1024 bits or longer.
Publish a DMARC record for your domain. DMARC helps senders protect their domain against email spoofing.
For SPF and DKIM to authenticate a message, the message From: header must match the sending domain. Messages must pass either the SPF or the DKIM check to be authenticated.

## JS Number Typecase

return +( Math.round(this*pow) / pow );