What this is
A guide to setting up DKIM so your emails are cryptographically signed.
Why it matters
DKIM proves your emails haven’t been altered and increases trust with inbox providers.
What to do
Log into your sending platform (ESP)
Locate your DKIM settings
Generate or copy your DKIM records
Log into your domain provider
Add the DKIM record as a TXT or CNAME record (depends on provider)
Save changes
Return to your ESP and verify
Where to find DKIM
Inside your sending platform settings
Common platforms like SendGrid, Mailgun, or Amazon SES provide this directly
Common mistakes
Adding DKIM to the wrong domain or subdomain
Not verifying after setup
Copying records incorrectly
Expert insight
DKIM must be enabled in both your DNS and your sending platform to work properly.