Domain Intelligence
Last Updated:
Cranbrook Email Verification
Safe to Send
Cranbrook.edu is operated by Cranbrook Academy of Art. The domain runs 2 mail exchanges and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
15
/100
Low
Verify Mailbox
Verify @cranbrook.edu emails
Live SMTP handshake against cranbrook.edu mail servers. No email is sent. 10 free per day, no signup.
Trusted by 400,000+ senders
4.9/5
From 8,500+ verified reviews
I run cold for an agency. We've used Hunter, NeverBounce, and ZeroBounce. This matches them on accuracy and is meaningfully cheaper at our volume. Switched everything over in March. Priya Nair
SOC 2 Type II
GDPR
CCPA
99.7% Accuracy
Disposable
No
Persistent addresses, not throwaway
SMTP Live
Yes
Mail server responds to SMTP handshake
MX Records
2
Mail exchangers
Mail Exchange (MX) Records for cranbrook.edu Mail Exchange records. They tell other mail servers which hosts are responsible for receiving email at this domain, in priority order. Lower priority numbers are tried first.
#0
mxa-0073fe01.gslb.pphosted.com 205.220.171.36
Reachable
#10
mxb-0073fe01.gslb.pphosted.com 205.220.171.36
Reachable
SMTP Handshake
Simple Mail Transfer Protocol. We open a live SMTP connection to the primary MX and read the greeting banner. A response confirms the mail server is alive and accepting connections.
Responsive
BANNER220 mx0a-0073fe01.pphosted.com ESMTP mfa-m0300477
Primary mail server accepted SMTP connection and returned a banner during the live audit.
cranbrook.edu Email Authentication SPF · DKIM · DMARC
SPF
Sender Policy Framework. A DNS record listing which servers are allowed to send mail for this domain. Receivers reject or flag mail from unauthorized servers.
Pass
TXTv=spf1 ip4:50.28.12.136 ip4:64.91.224.131 ip4:198.134.8.30 ip4:173.231.203.249 ip4:136.147.140.182 ip4:205.201.133.57 ip4:34.110.180.34 ip4:54.205.77.233 ip4:205.139.105.140 ip4:18.232.228.108 ip4:54.196.161.150 ip4:104.192.32.80/29 ip4:104.192.36.80/29 ip4:209.239.233.124 ip4:209.220.191.124 ip4:207.32.246.253 a:wt3.cranbrook.edu include:spf.protection.outlook.com include:spf.constantcontact.com include:spf.mandrillapp.com include:spf.maropost.com include:spf-0073fe01.pphosted.com ~all
Authorized senders are defined and pass SPF policy.
DKIM
DomainKeys Identified Mail. The sending server cryptographically signs outbound mail with a private key, and receivers verify the signature using a public key in DNS.
Pass
SELECTORDetected via standard selectors
A DKIM signature was detected. Outbound mail from this domain can be cryptographically verified.
DMARC
Domain-based Message Authentication, Reporting & Conformance. Tells receivers what to do when SPF or DKIM checks fail: none, quarantine, or reject.
Quarantine
TXTv=DMARC1;p=quarantine;pct=10;sp=none;rua=mailto:7f656998@mxtoolbox.dmarc-report.com;ruf=mailto:7f656998@forensics.dmarc-report.com
Receivers are instructed to quarantine (route to spam) any mail that fails SPF or DKIM.
cranbrook.edu Domain Registration WHOIS · Nameservers · Registrar
RegisteredMay 18, 1994
Last UpdatedJanuary 14, 2026
ExpiresJuly 31, 2027
Age31 years
TLD.edu
Authoritative Nameservers (4)
- NS3-07.AZURE-DNS.ORG
- NS4-07.AZURE-DNS.INFO
- NS2-07.AZURE-DNS.NET
- NS1-07.AZURE-DNS.COM
Registrant
Cranbrook Educational Community
Bloomfield Hills, MI, UNITED STATES
Technical Contact
admin
Cranbrook Educational Community
admin@cranbrook.edu·Bloomfield Hills, MI, UNITED STATES·12486453107
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Common Questions About cranbrook.edu
Is cranbrook.edu a disposable or temporary email provider?
No. cranbrook.edu is not a disposable email provider. It is classified as Education Email operated by Cranbrook Academy of Art and addresses on cranbrook.edu are persistent rather than throwaway. Mail sent to a valid cranbrook.edu mailbox reaches a real recipient.
How do I verify if a cranbrook.edu email address is valid?
The fastest way to verify a cranbrook.edu email address is to use our email checker. Enter any @cranbrook.edu mailbox at the top of this page and our system performs a real-time SMTP handshake against cranbrook.edu's mail servers, confirming whether the mailbox exists, is reachable, and is safe to send to. No email is ever delivered during the check.
Can I check if a cranbrook.edu email exists without sending a message?
Yes. Our real-time email verification API connects directly to cranbrook.edu's mail server, opens an SMTP session, and queries the mailbox using the RCPT TO command without ever transmitting an actual email. The server's response confirms whether the cranbrook.edu mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for cranbrook.edu?
cranbrook.edu currently publishes 2 mail exchange (MX) records. The primary MX is mxa-0073fe01.gslb.pphosted.com, which is the first server contacted when other mail systems try to deliver email to a cranbrook.edu address. The full list with priorities and IP addresses is in the MX Records panel above. MX records tell sending servers where to route email for cranbrook.edu.
Does cranbrook.edu use SPF, DKIM, and DMARC email authentication?
cranbrook.edu enforces all three email authentication standards: SPF, DKIM, and DMARC (policy: quarantine). This is the gold-standard configuration. It means receivers can verify that mail claiming to come from @cranbrook.edu is genuine, and cranbrook.edu's DMARC policy of 'quarantine' instructs receivers how to handle messages that fail those checks.
Why do emails to cranbrook.edu bounce or get blocked?
Bounces from cranbrook.edu usually fall into three buckets: the mailbox doesn't exist (5xx user unknown), the inbox is full, or your sending domain isn't authenticated to cranbrook.edu's satisfaction. The fastest fix is to run each address through a free email verifier before you send, and to make sure your own SPF, DKIM, and DMARC are configured correctly so cranbrook.edu's receivers trust you.
How can I verify a large list of cranbrook.edu email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of cranbrook.edu addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, cranbrook.edu catch-all detection, role-account detection, and disposable-domain matching. Results typically come back within minutes and previously-failed addresses on your blacklist are reprocessed for free. For continuous high-volume needs, see our unlimited email verification API.
Is it safe to accept signups from cranbrook.edu email addresses?
Yes, with normal hygiene. cranbrook.edu is a legitimate email service and signups from @cranbrook.edu behave like any other real user. Pipe each address through a real-time email verifier API at the moment of signup to catch typos and dead mailboxes, but there is no need to block cranbrook.edu by default.
What email format does cranbrook.edu use for usernames?
Most cranbrook.edu mailboxes follow common patterns like first.last@cranbrook.edu, firstinitiallast@cranbrook.edu, or first@cranbrook.edu, but the actual local-part rules depend on Cranbrook Academy of Art. The only reliable way to confirm whether a specific @cranbrook.edu address exists is to run it through a free email verification tool. Guessing patterns will produce a high bounce rate and damage your sender reputation.
How is the cranbrook.edu risk score calculated?
The 0-to-100 risk score for cranbrook.edu combines disposable-domain classification, mail-server reachability, MX record presence and depth, SPF / DKIM / DMARC enforcement, DMARC policy strength, SMTP banner response, and domain age. Lower scores mean safer to send to. Disposable domains are pinned at the high end of the scale. The cranbrook.edu score is recomputed on every audit so it always reflects the live state of the domain.