What is an IP pool? A Clear Guide

An IP pool is a set of sending IPs; separating transactional and marketing traffic into different pools isolates their reputations.

Why it matters

Knowing an IP pool 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.