Check your messaging and DNS records before you ship to production.

Generate authentication keys, inspect raw email headers, preview interactive WhatsApp templates, and calculate SMS segments directly in your browser.

邮件身份验证

Configure a DMARC policy that protects your domain from spoofing, or paste an existing DNS record to review its enforcement rules in plain English.

邮件身份验证

Upload an XML aggregate report from your mailbox providers to see which servers send as your domain, what passes authentication, and what to fix.

邮件身份验证

Create and validate the DNS record that displays your brand logo in supporting inboxes, or paste an existing record to verify its settings.

邮件身份验证

Generate an RSA key pair and its public DNS record locally in your browser, or paste an existing DKIM record to inspect its configuration.

DNS 记录

Split long DKIM keys and TXT records into quoted 255-character strings formatted for Cloudflare, Route 53, Azure, or a zone file.

邮件诊断

Paste raw email source to inspect SPF, DKIM, and DMARC verdicts alongside hop-by-hop delivery delays.

消息

Design interactive WhatsApp messages with buttons, lists, and media, preview how they look on a phone, and copy the ready-to-send request.

消息

Paste your SMS copy to see its character encoding, billable segment count, and which characters smart encoding can replace to keep messages short.

付诸实践。

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