This week, one of our client has asked to sign their emails which goes out from our software with DKIM. That's the first time I came across that term. So I got started with Google.
Found good explanation of what is DKIM in this article by CloudFlare.
DKIM stand for Domain Key Identified Mail. It is a mechanism use to reduce spam emails.
DKIM uses digital signature to identify the email is actually coming from the said domain. It has two parts:
- DNS record
- DKIM header included in the email
Email servers use DNS record with conjunction with DKIM header in the email to authenticate the email.
DNS record contains the public key for the signature.
DKIM header is the email signed by the email provider with the private key.
I will update this article when I get the chance to implement in our software.
Here is how it setup - Part 2
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