What is DKIM key rotation? A Clear Guide

Rotating DKIM keys periodically limits the damage if a key is exposed; selectors let you rotate without downtime.

Why it matters

Knowing DKIM key rotation helps you build reliable sending. See the email API quickstart.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, a REST API, and an AI watching deliverability — and it welcomes senders SES, SendGrid and Mailchimp reject, from $8. Run the free checker or see plans.