sysu.edu.cn

Email infrastructure report · Last checked 24 Jul 2026, 01:29 UTC

Summary

sysu.edu.cn uses Self-hosted / Custom for email and has SPF and DMARC configured. It is not catch-all.

Mail provider

ProviderSelf-hosted / Custom self-hosted

Primary MXmail.sysu.edu.cn

MX records

Priority	Hostname	IPs
10	mail.sysu.edu.cn	202.116.64.41

Authentication

SPF✓ Present -all

DKIM? Not detected via common selectors

DMARC✓ Present p=reject

Raw SPF record

v=spf1 ip4:202.116.64.0/24 -all

Raw DMARC record

v=DMARC1; p=reject; sp=reject; rua=mailto:dmarc_report@mail.sysu.edu.cn

Email behavior

Catch-all✗ No

Disposable✗ No

Free provider✗ No

STARTTLS✓ Supported

SMTP response1452ms

SMTP banner220 mail.sysu.edu.cn Anti-spam GT for Coremail System (mail.sysu.edu.cn[20251013])

What this means

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

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  -G --data-urlencode "email=test@sysu.edu.cn" \
  -H "Authorization: Bearer cm_live_..."