bs.naist.jp

Email infrastructure report · Last checked 28 Jul 2026, 21:20 UTC

Summary

bs.naist.jp uses Self-hosted / Custom for email and has SPF configured. It is not catch-all.

Mail provider

ProviderSelf-hosted / Custom self-hosted

Primary MXmailsgw40.naist.jp

MX records

Priority	Hostname	IPs
100	mailsgw40.naist.jp	163.221.12.158, 2001:df3:540:d32::158

Authentication

SPF✓ Present ?all

DKIM? Not detected via common selectors

DMARC✗ Missing

Raw SPF record

v=spf1 ip4:163.221.0.0/16 ip6:2001:200:16a::/48 ip6:2001:df3:540::/48 include:_spf.salesforce.com ?all

Email behavior

Catch-all✗ No

Disposable✗ No

Free provider✗ No

STARTTLS? Could not determine (connection refused)

SMTP response—

SMTP banner—

What this means

This domain is missing DKIM, DMARC, which weakens its protection against email spoofing. Adding these records would improve deliverability and reduce the risk of impersonation.

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