citadel.com - Email Domain Verification & Deliverability Report

Active Corporate Email
Organization: Citadel LLC
Mail Server: Proofpoint
Verified 5 days ago

Verify email addresses @citadel.com. View MX records, mail server configuration, and authentication status for Citadel LLC.

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MX Records for citadel.com

PriorityMail ServerIP Address
10 mxa-001f6701.gslb.pphosted.com 148.163.140.71
10 mxb-001f6701.gslb.pphosted.com 148.163.144.71
SMTP Status: Responding
SMTP Banner:
220 mx0b-001f6701.pphosted.com ESMTP mfa-m0162559

citadel.com uses Proofpoint mail servers, which means emails are processed through Proofpoint infrastructure with their built-in spam filtering and security controls.

Email Authentication for citadel.com

SPF Record Pass

v=spf1 include:spf-001f6703.pphosted.com include:spf-001f6701.pphosted.com include:amazonses.com include:spf.protection.outlook.com ~all
Authorized Senders:
spf-001f6703.pphosted.com spf-001f6701.pphosted.com amazonses.com spf.protection.outlook.com

SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of citadel.com.

DMARC Record Quarantine

v=DMARC1; p=quarantine; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

DMARC (Domain-based Message Authentication) tells receiving servers what to do with emails that fail authentication checks.

DKIM Not Detected

DKIM detection is limited from external scanning. The domain may use DKIM with selectors not covered by our scan.

Authentication Summary: citadel.com has SPF and DMARC configured. This provides good protection against email spoofing. Senders can expect reliable email delivery to this domain.

WHOIS & Domain Information

Registration Details

Domain
citadel.com
TLD
.com
Created
1994-12-29
Updated
2026-03-16
Expires
2026-12-29
Domain Age
31 years

Registrar

Name
CSC Corporate Domains, Inc.
IANA ID
299

Registrant Contact

Organization
CE TM Holdings LLC
Location
FL, UNITED STATES

Name Servers

  • ns-793.awsdns-35.net
  • ns-1556.awsdns-02.co.uk
  • ns-164.awsdns-20.com
  • ns-1517.awsdns-61.org

Verifying Emails at Citadel LLC

Citadel LLC (citadel.com) is a multinational hedge fund and financial services company headquartered in Miami, Florida. Founded by Ken Griffin, Citadel is one of the world's largest and most successful hedge funds, managing over $60 billion in assets. Citadel Securities, the firm's market-making arm, handles a significant percentage of all U.S. equity trading volume.

Citadel implements strict email authentication on the citadel.com domain with SPF, DKIM, and DMARC enforcement. As a major hedge fund and market maker handling enormously sensitive trading data, Citadel maintains the highest email security standards to protect proprietary trading algorithms and investor communications.

Email verification against citadel.com returns definitive responses for valid and invalid mailboxes. The domain does not operate as catch-all. Citadel's mail infrastructure implements strict rate limiting and advanced security monitoring on inbound connections.

Reaching citadel.com inboxes requires impeccable sender authentication. Hedge funds enforce the most demanding email filtering to protect trading intelligence. Full SPF, DKIM, and DMARC compliance with strong reputation is essential for delivery.

How to Verify citadel.com Email Addresses

Need to check if an email address at citadel.com actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to citadel.com's mail servers to confirm the mailbox is real, active, and able to receive your message. No test email is ever sent, so your sender reputation stays protected.

Verify a Single citadel.com Email
Use BulkEmailChecker's free email verification tool to instantly validate any citadel.com address. You'll get a complete deliverability report including mailbox existence, catch-all detection, disposable domain flagging, and risk scoring, all in under 3 seconds.

Verify a List of citadel.com Emails in Bulk
Have a mailing list full of citadel.com addresses? Upload your CSV or TXT file to BulkEmailChecker and verify thousands of email addresses in minutes. Our bulk verification engine runs 30+ checks per address including syntax validation, DNS resolution, SMTP handshake, and spam trap detection. Clean your list before every campaign to keep bounce rates below 2% and protect your sender score. See bulk pricing.

Verify citadel.com Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates citadel.com email addresses at the point of entry, blocking invalid, disposable, and risky addresses before they enter your database. Integrate with a single API call and prevent bad data at the source.

Frequently Asked Questions

Yes, citadel.com is the official corporate email domain for Citadel LLC. It is used for internal business communications and is not available for public registration.
No, citadel.com is a corporate email domain belonging to Citadel LLC, used exclusively by employees and authorized personnel.
citadel.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
B2B marketing to citadel.com requires proper consent. Corporate domains may use catch-all configurations, so verify individual addresses before sending.
Corporate domains like citadel.com may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.
The fastest and most accurate way to verify a citadel.com email address is to use BulkEmailChecker's free email verification tool. Simply enter the full email address and our system performs SMTP-level validation by connecting directly to citadel.com's mail servers. You'll get instant results showing whether the mailbox exists, is deliverable, and is safe to send to, all without sending a single email.
Yes. BulkEmailChecker uses SMTP verification to check if a citadel.com mailbox exists without ever delivering an email. Our system connects to the domain's mail server, performs an SMTP handshake, and queries the mail server to confirm whether the recipient address is valid. This process is completely invisible to the email recipient and does not affect your sender reputation.
Sending to invalid email addresses causes hard bounces, which directly damage your sender reputation. Internet Service Providers (ISPs) and email providers track your bounce rate, and if it exceeds 2%, your emails may start landing in spam folders or get blocked entirely. Verifying citadel.com addresses with BulkEmailChecker before sending prevents bounces and keeps your deliverability high.
BulkEmailChecker's bulk verification service lets you upload a CSV or TXT file containing thousands of citadel.com email addresses and verify them all at once. Each address goes through 30+ verification checks including syntax validation, DNS/MX lookup, SMTP verification, disposable domain detection, and spam trap identification. Results are typically ready within minutes and can be downloaded as a clean, verified list.
Email verification is the process of confirming that an email address is real, properly formatted, and capable of receiving messages. It matters because sending to invalid addresses causes bounces, damages your sender reputation, wastes marketing budget, and can get your sending IP blacklisted. BulkEmailChecker verifies addresses at the SMTP level, the most accurate method available, ensuring your emails reach real people.
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email for a domain. When you send an email, your mail server looks up the recipient domain's MX records to find where to deliver the message. If a domain has no MX records, it cannot receive email. BulkEmailChecker checks MX records as part of every verification to confirm the domain is configured for email delivery.
A catch-all (or accept-all) domain is configured to accept email sent to any address at that domain, regardless of whether the specific mailbox exists. This makes it harder to verify individual addresses because the server always responds positively. BulkEmailChecker detects catch-all configurations and flags them in verification results so you can make informed decisions about sending to those addresses.
Yes. BulkEmailChecker offers a real-time email verification API that you can integrate into signup forms, CRM systems, lead capture tools, and any application that collects email addresses. The API validates addresses at the point of entry, blocking invalid, disposable, and risky emails before they enter your database. Integration takes just a single API call with response times under 3 seconds.

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