Rank #7,052Updated November 10, 2026
sdu.edu.cn
Shandong University Mail System
The site runs on HSTS. Its email security grade is F. Its SSL certificate is issued by GlobalSign nv-sa and is valid for 154 more days.
- Domain age
- —
- Technologies
- 1
- Email security
- F
- SSL days left
- 154
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 211.86.56.247 | 300 |
| A | 202.194.14.6 | 300 |
| A | 202.194.15.6 | 300 |
| MX | mx-sdu-edu-cn.icoremail.net 5 | 300 |
| MX | sdu.edu.cn 10 | 300 |
| NS | sdunetsv2.sdu.edu.cn | 300 |
| NS | sdunetnms.sdu.edu.cn | 300 |
| NS | sdunetsv3.sdu.edu.cn | 300 |
| TXT | v=spf1 ip4:202.194.15.6 ip4:202.194.14.6 ip4:211.86.56.247 include:spf.icoremail.net -all | 300 |
| TXT | adobe-idp-site-verification=cef8bf80d248a94fa8b062412bf40df7a25445b49d5aac2d1eb7a642700bc455 | 300 |
| TXT | _yxei1p4rs4wrzu1xkjc21adqzpy1kve | 300 |
Technology stack
Security
SSL certificate
| Valid | Valid |
|---|---|
| Issuer | BE, GlobalSign GCC R3 DV TLS CA 2020, GlobalSign nv-sa |
| Expires | April 13, 2027 |
| Days remaining | 154 |
| Protocol | TLSv1.3 |
| Names | *.sdu.edu.cn, owa.sdu.edu.cn, mail.sdu.edu.cn, autodiscover.sdu.edu.cn, www.sdu.edu.cn, sdu.edu.cn |
Email security
FScore 30/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- badNo DMARC record. Receivers have no instructions for mail that fails SPF and DKIM, and you get no reports about who sends as your domain.
- warnSPF uses 8 of the 10 allowed DNS lookups. Adding another service may break it.
- warnNo DKIM key found at common selectors (google, selector1, selector2, default, k1, k2, s1, s2, ...). DKIM may still use a custom selector we cannot guess.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with -all: servers you have not listed are rejected (hard fail).
- good2 MX record(s) found.
Homepage metadata
| Title | Shandong University Mail System |
|---|---|
| Indexable | Yes |
| Word count | 2 |
About sdu.edu.cn
What technology does sdu.edu.cn use?
We detected 1 technologies on sdu.edu.cn, including HSTS.
Does sdu.edu.cn protect its email with SPF and DMARC?
sdu.edu.cn scores 30/100 (grade F) for email security. No DMARC record. Receivers have no instructions for mail that fails SPF and DKIM, and you get no reports about who sends as your domain. SPF uses 8 of the 10 allowed DNS lookups. Adding another service may break it.
What are the name servers of sdu.edu.cn?
sdu.edu.cn uses sdunetsv2.sdu.edu.cn, sdunetnms.sdu.edu.cn, sdunetsv3.sdu.edu.cn.