What is a DKIM selector? A Clear Guide

A DKIM selector is the label in your DKIM DNS record that lets a domain host multiple keys (e.g. for different senders) and rotate them without downtime.

Why it matters

Getting a DKIM selector right keeps you compliant and lands more mail in the inbox. See the deliverability checklist.

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, plus an AI watching list health and deliverability — and it welcomes senders SES, SendGrid and Mailchimp reject, from $8. Run the free checker or see plans.