CheckMail

harnets.ai

Email infrastructure report · Last checked

Summary

harnets.ai uses Self-hosted / Custom for email and has SPF configured. It is not catch-all.

Mail provider

ProviderSelf-hosted / Custom self-hosted
Primary MXmx1.feishu.cn

MX records

PriorityHostnameIPs
1mx1.feishu.cn52.220.106.220
5mx2.feishu.cn101.126.58.225, 122.14.229.0
10mx3.feishu.cn122.14.229.0, 101.126.58.225, 52.220.106.220

Authentication

SPF✓ Present -all
DKIM? Not detected via common selectors
DMARC✗ Missing
Raw SPF record
v=spf1 +include:_netblocks.m.feishu.cn -all

Email behavior

Catch-all✗ No
Disposable✗ No
Free provider✗ No
STARTTLS✓ Supported
SMTP response491ms
SMTP banner220 n126-036-051 ESMTP ready

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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