What is list segmentation? A Clear Guide

Segmentation splits your list into groups by behavior or attributes so you send more relevant mail — which lifts engagement and protects deliverability.

Why it matters

Knowing list segmentation 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.