Why DKIM Matters

DKIM directly impacts deliverability. Many ISPs favor DKIM-signed emails in their filtering algorithms because it’s a quality signal. Emails with a valid DKIM are far more likely to hit the inbox because the mailbox provider trusts the source and content integrity. Unsigned emails (or ones with broken signatures) raise suspicion and may be sent to spam even if the content is fine.

Without DKIM, anyone could potentially impersonate your domain by modifying emails in transit. With DKIM, any such tampering would break the signature and reveal the fraud. You’re not just protecting your emails; you’re protecting your brand’s reputation. And ISPs love senders who care about that stuff.