What is email open rate? A Clear Guide

Open rate is the share of delivered emails that were opened. Privacy features inflate it, so pair it with clicks for a true engagement read.

Why it matters

Knowing email open rate helps you send mail that lands 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.