Domain warmup is free on Arcinbox. See what is included

Free tools

Check your setup.
Before you send.

Look up the records and listings that decide whether your email gets delivered. Every check runs in your browser.

Blacklist checkerCheck a domain or IPv4 address against public DNS blocklists.SPF checkerLook up a domain’s SPF record and check it for common mistakes.DKIM checkerFind the DKIM public key published for a domain and selector.DMARC checkerRead a domain’s DMARC record and see what its policy tells receiving servers.MX lookupList the mail servers that receive email for a domain, in priority order.Spam word checkerPaste your email copy and see which words and phrases are likely to draw spam filters.

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$2.50 per mailbox.

Google and Microsoft mailboxes with fast setup, premium DNS, and free warmup.