Auto-discovery SRV List & Mail Config | iN2 Tools

Verify DNS records required for automatic mail client setups (Autodiscover, Autoconfig, and all IMAP/SMTP SRVs).

Auto-discovery SRV List & Mail Client Configuration

Verify DNS CNAME and SRV records required for automatic mail client provisioning across Outlook, Thunderbird, Apple Mail, IMAP, POP3, and Submission ports.

How Mail Client Auto-configuration Works

Modern desktop and mobile mail clients (such as Microsoft Outlook, Mozilla Thunderbird, and iOS Mail) query DNS records to automatically discover IMAP/SMTP hostnames, port numbers, and encryption requirements without forcing users to enter settings manually.

Key Auto-discovery Records

  • Microsoft Exchange Autodiscover: autodiscover.example.com CNAME autodiscover.outlook.com or _autodiscover._tcp.example.com SRV 0 0 443 mail.example.com.
  • Thunderbird Autoconfig: autoconfig.example.com CNAME mail.example.com.
  • IMAPS SRV Record: _imaps._tcp.example.com SRV 0 0 993 mail.example.com.
  • Submission (SMTP TLS) SRV Record: _submission._tcp.example.com SRV 0 0 587 mail.example.com.

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