Domain Intelligence
Last Updated:

Cosco.com

Proceed With Care

Cosco.com is operated by COSCO Shipping. The domain runs 1 mail exchange and SMTP is not currently responding, with no email authentication detected.

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@cosco.com
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Disposable
No
Persistent addresses, not throwaway
SMTP Live
No
Mail server not responding to SMTP
MX Records
1
Mail exchangers

Mail Exchange (MX) Records for cosco.com 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.

1 RECORD
#1
mailex.cosco.com 218.249.115.168
No Response
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. No Response
BANNER220 cosco.com ESMTP Service Ready
Primary mail server did not respond to SMTP within the audit timeout. Mail to cosco.com may bounce.

cosco.com Email Authentication SPF · DKIM · DMARC

0/3 PASS
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. Missing
No SPF TXT record published for cosco.com.
No valid SPF record was published. Receivers cannot confirm which servers are allowed to send mail for this domain.
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. Missing
No DKIM signature detected on common selectors for cosco.com.
No DKIM signature was detected. Receivers cannot verify the integrity of outbound mail.
DMARC Domain-based Message Authentication, Reporting & Conformance. Tells receivers what to do when SPF or DKIM checks fail: none, quarantine, or reject. Missing
No DMARC record published at _dmarc.cosco.com.
No DMARC policy is published. Receivers have no instruction for handling failed messages from this domain.

cosco.com Domain Registration WHOIS · Nameservers · Registrar

26 YEARS OLD
RegistrarNetwork Solutions, LLC
IANA ID2
RegisteredNovember 27, 1999
Last UpdatedNovember 27, 2023
ExpiresNovember 27, 2033
Age26 years
TLD.com
Authoritative Nameservers (2)
  • HOME.COSCO.COM.CN
  • NS2.COSCON.COM
Registrant
Registrant Street: Floor 11 Ocean Plaza,
yaojiuwu@COSCO.COM·Beijing, --, CHINA·861066492669
Technical Contact
Yao, Jiuwu
yaojiuwu@COSCO.COM·CHINA·86861066492669

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Common Questions About cosco.com

Is cosco.com a disposable or temporary email provider?
No. cosco.com is not a disposable email provider. It is classified as Corporate Email operated by COSCO Shipping and addresses on cosco.com are persistent rather than throwaway. Mail sent to a valid cosco.com mailbox reaches a real recipient.
How do I verify if a cosco.com email address is valid?
The fastest way to verify a cosco.com email address is to use our free email checker. Enter any @cosco.com mailbox at the top of this page and our system performs a real-time SMTP handshake against cosco.com'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 cosco.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to cosco.com'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 cosco.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for cosco.com?
cosco.com currently publishes 1 mail exchange (MX) record. The primary MX is mailex.cosco.com, which is the first server contacted when other mail systems try to deliver email to a cosco.com 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 cosco.com.
Does cosco.com use SPF, DKIM, and DMARC email authentication?
cosco.com does not currently publish any of the three standard email authentication records (SPF, DKIM, DMARC). This means receivers have no automated way to confirm whether mail claiming to come from @cosco.com is legitimate, which can hurt deliverability and increases the risk of spoofing.
Why do emails to cosco.com bounce or get blocked?
Bounces from cosco.com 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 cosco.com'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 cosco.com's receivers trust you.
How can I verify a large list of cosco.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of cosco.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, cosco.com 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 cosco.com email addresses?
Yes, with normal hygiene. cosco.com is a legitimate email service and signups from @cosco.com 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 cosco.com by default.
What email format does cosco.com use for usernames?
Most cosco.com mailboxes follow common patterns like first.last@cosco.com, firstinitiallast@cosco.com, or first@cosco.com, but the actual local-part rules depend on COSCO Shipping. The only reliable way to confirm whether a specific @cosco.com 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 cosco.com risk score calculated?
The 0-to-100 risk score for cosco.com 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 cosco.com score is recomputed on every audit so it always reflects the live state of the domain.
Is cosco.com a valid corporate email domain?
Yes, cosco.com is the official corporate email domain for COSCO Shipping. It is used for internal business communications and is not available for public registration.
Is cosco.com a disposable or temporary email provider?
No, cosco.com is a corporate email domain belonging to COSCO Shipping, used exclusively by employees and authorized personnel.
What mail server does cosco.com use?
cosco.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to cosco.com addresses?
B2B marketing to cosco.com requires proper consent. Corporate domains may use catch-all configurations, so verify individual addresses before sending.
How do I verify an email address at cosco.com?
Corporate domains like cosco.com may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.