What is the email preheader? A Clear Guide

The preheader is the preview text shown after the subject line in the inbox. A strong preheader lifts open rates.

Why it matters

Knowing the email preheader 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.