What is a catch-all address? A Plain-English Guide
A catch-all accepts mail to any address at your domain, even nonexistent ones. It can collect spam-trap hits and hurt reputation, so most senders should avoid relying on it.
Why it matters for deliverability
Understanding a catch-all address is part of a hidden reputation risk. Get it right and more of your mail reaches the inbox; get it wrong and even legitimate mail can be filtered.
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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 that watches your list health and deliverability — and it welcomes the senders Amazon SES, SendGrid and Mailchimp reject, from $8. Run the free 10-second checker or see plans.