Yes. You can verify any @Csx.com address in real time with a direct SMTP handshake that provides 99.7% accuracy. Csx.com is operated by CSX Transportation, runs 1 mail server, enforces 3 of 3 authentication standards, and is currently responding to SMTP.
Every check returns one of three clear outcomes so you know exactly what to do with the address.
The mailbox exists and accepts mail. Send with confidence, the address is deliverable.
The mailbox does not exist, is disposable, or will hard-bounce. Remove it to protect your sender reputation.
The server is catch-all or greylisting, so existence cannot be confirmed. Send selectively and watch engagement.
csx.com publishes 1 MX record. The primary mail exchanger is csx-com.mail.protection.outlook.com, hosted by Microsoft 365, and it is currently reachable and answering SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 0 | csx-com.mail.protection.outlook.com | 52.101.41.22 | Reachable |
220 MN1PEPF0000F0E2.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Tue, 2 Jun 2026 21:10:12 +0000 [08DEBE17E3174F57]Yes. csx.com is a valid email domain, operated by CSX Transportation. Addresses are persistent and real mail reaches a genuine recipient. Individual mailboxes still go stale, so verify each one before you send.
A live SMTP handshake connects to Csx.com's mail server and asks whether the mailbox exists using the RCPT TO command, without ever transmitting a message. The recipient never sees the check.
Each address runs through 30+ checks including SMTP existence, catch-all detection, role-account filtering, and disposable matching. The same engine has verified billions of addresses since 2012.
Every unverified address is a gamble. Here is what happens when you skip verification and mail a list that has not been cleaned.
People leave companies. Verification flags csx.com mailboxes deactivated since you collected them.
Expired or full csx.com inboxes hard-bounce. A live SMTP check catches them before you hit send.
Low bounce rates keep you trusted by csx.com mail servers and the major mailbox providers.
Verified contacts mean your CRM, lead scoring, and routing all run on addresses that reach a person.
Csx.com is CSX Transportation, registered through CSC Corporate Domains, Inc. and first seen May 16, 1995.
CSX Transportation (csx.com) is a major freight railroad in the eastern United States, headquartered in Jacksonville, Florida. CSX operates approximately 20,000 miles of track across 23 states, transporting coal, intermodal containers, chemicals, agricultural products, and automotive goods. The company is one of the largest railroads in North America.
CSX implements enterprise email authentication on the csx.com domain with SPF, DKIM, and DMARC enforcement. As critical transportation infrastructure, CSX maintains robust email security to protect shipping logistics, hazardous materials documentation, and railway operations communications.
SMTP verification of csx.com addresses returns definitive responses for valid and invalid mailboxes. The domain does not function as catch-all. CSX's enterprise mail infrastructure implements rate limiting on inbound SMTP connections.
For partners communicating with CSX employees, proper sender authentication improves deliverability. CSX's corporate email filters enforce SPF, DKIM, and DMARC validation. Authentication compliance ensures reliable inbox delivery to csx.com addresses.
Upload a CSV or TXT list of Csx.com addresses to the bulk email verifier. Every address runs through a live SMTP handshake plus catch-all, role-account and disposable detection, and you download a clean list when processing completes. For real-time checks at signup, use the real-time email verification API.
CSV or TXT with one email per line. No formatting needed.
Each Csx.com address is checked with a live server handshake.
Get a verified list with status codes, risk flags, and catch-all detection.
Pay as you go. No subscriptions, and credits never expire.
Everything about verifying email at this domain.
Yes, csx.com is the official corporate email domain for CSX Transportation. It is used for internal business communications and is not available for public registration.
No, csx.com is a corporate email domain belonging to CSX Transportation, used exclusively by employees and authorized personnel.
csx.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
B2B marketing to csx.com requires proper consent. Corporate domains may use catch-all configurations, so verify individual addresses before sending.
Corporate domains like csx.com may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.
Upload a CSV or TXT list to the bulk email verifier. Every address runs through 30+ checks including SMTP existence, catch-all detection, role-account, and disposable matching. Processing time depends on list size.
99.7% accurate using a direct SMTP handshake with csx.com's mail servers, the same engine that has verified billions of addresses since 2012.
Other corporate email domains we have audited.