Google Is Failing Your Perfectly Good DKIM-and Why That's a Good Thing

"DKIM is a method that applies a digital signature to verify that an email is authorized by the domain that signed it and that its content has not been altered after signing. DKIM intentionally separates the identity of the signer from the visible "From" author domain. This method helps email providers, like Gmail, confirm the sender's identity and prevents threat actors from impersonating your brand."

"Google could be failing your DKIM for various reasons: Your DKIM might not be set up correctly. Sent messages are not passing DKIM authentication checks. Message forwarding can alter email content, invalidating the DKIM signature. Poor email sending practices can land DKIM-signed emails in spam folders. Your domain provider's TXT record character limits might truncate or disorder your DKIM key."

DKIM is a digital signature method that verifies emails are authorized by their signing domain and content remains unaltered. It separates the signer's identity from the visible sender, helping email providers like Gmail confirm authenticity and prevent brand impersonation. DKIM failures occur due to incorrect setup, failed authentication checks, message forwarding altering content, poor sending practices, TXT record character limits truncating keys, or excessive DKIM signatures. Google's strict validation protects both senders' brands and recipients from fraud, representing a positive development for email security despite the challenges it presents.

Read at Litmus