mcgraw-hill.com

Valid Email Server
Domain Lookup › mcgraw-hill.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
mcgraw-hill.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-18 17:50:24 UTC · ↺ Refresh

MX Hostnames

  • mxb-00363701.gslb.pphosted.com
  • mxa-00363701.gslb.pphosted.com

MX Priorities

  • mxb-00363701.gslb.pphosted.com: 10
  • mxa-00363701.gslb.pphosted.com: 10

A / AAAA Records

  • 204.74.99.100 ↩ crs.ultradns.net

Mail Server IPs

  • 67.231.149.29 ↩ mx0a-00363701.pphosted.com
  • 67.231.157.28 ↩ mx0b-00363701.pphosted.com

SOA Record

Raw SOA pdns85.ultradns.com hostmaster.mheducation.com 2015112726 86400 86400 86400 3600
Primary NS (mname)
pdns85.ultradns.com
Admin Email (rname)
hostmaster@mheducation.com
Serial
2015112726
Refresh
86400s
Retry
86400s
Expire
86400s
Minimum TTL
3600s

Nameservers (NS)

pdns85.ultradns.com
pdns85.ultradns.net
pdns85.ultradns.org
pdns85.ultradns.biz

SPF Record

✓ Strict (-all)
v=spf1 ip4:192.243.80.160/28 ip4:192.243.88.160/28 ip4:20.157.64.168/32 ip4:192.243.87.2/32 ip4:192.243.86.2/32 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

2 records
  • MS=ms88994943
  • SPFv=spf1 ip4:192.243.80.160/28 ip4:192.243.88.160/28 ip4:20.157.64.168/32 ip4:192.243.87.2/32 ip4:192.243.86.2/32 -all
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