What is an email queue? A Clear Guide

An email queue buffers outgoing messages so your app can hand them off instantly while the sender delivers and retries in the background.

Why it matters

Knowing an email queue 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.