Domain Intelligence
Last Updated:

Unum.com

Safe to Send

Unum.com is operated by Unum Group. The domain runs 2 mail exchanges and SMTP is responsive, with all three authentication standards in force.

Safe to Send
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Verify @unum.com emails

Live SMTP handshake against unum.com mail servers. No email is sent. 10 free per day, no signup.

@unum.com
No email sent No signup Real-time SMTP

Trusted by 400,000+ senders

4.9/5
From 8,500+ verified reviews
Ran our entire 47k cold outbound list through this before our Q1 push. Bounce rate dropped from 9.4% to 0.8%. The SMTP-level catch on outdated B2B contacts is what set this apart from the other verifiers I tried. Andrew Mitchell · Sr. Demand Gen Manager
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 unum.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.

2 RECORDS
#10
mxb-004bf101.gslb.pphosted.com 205.220.180.78
Reachable
#10
mxa-004bf101.gslb.pphosted.com 205.220.180.78
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 mx0b-004bf101.pphosted.com ESMTP mfa-m0278863
Primary mail server accepted SMTP connection and returned a banner during the live audit.

unum.com Email Authentication SPF · DKIM · DMARC

3/3 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. Pass
TXTv=spf1 include:spf-004bf101.pphosted.com include:%{d}.42.spf-protect.agari.com exists:%{i}._i.%{d}._d.espf.agari.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. Reject
TXTv=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:unum@rua.agari.com; ruf=mailto:unum@ruf.agari.com
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.

unum.com Domain Registration WHOIS · Nameservers · Registrar

29 YEARS OLD
RegistrarCSC Corporate Domains, Inc.
IANA ID299
RegisteredAugust 5, 1996
Last UpdatedApril 20, 2026
ExpiresAugust 5, 2026
Age29 years
TLD.com
Authoritative Nameservers (4)
  • ns-498.awsdns-62.com
  • ns-754.awsdns-30.net
  • ns-1613.awsdns-09.co.uk
  • ns-1424.awsdns-50.org
Registrant
UnumProvident Corporation
ME, UNITED STATES

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Common Questions About unum.com

Is unum.com a disposable or temporary email provider?
No. unum.com is not a disposable email provider. It is classified as Corporate Email operated by Unum Group and addresses on unum.com are persistent rather than throwaway. Mail sent to a valid unum.com mailbox reaches a real recipient.
How do I verify if a unum.com email address is valid?
The fastest way to verify a unum.com email address is to use our free email checker. Enter any @unum.com mailbox at the top of this page and our system performs a real-time SMTP handshake against unum.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 unum.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to unum.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 unum.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for unum.com?
unum.com currently publishes 2 mail exchange (MX) records. The primary MX is mxb-004bf101.gslb.pphosted.com, which is the first server contacted when other mail systems try to deliver email to a unum.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 unum.com.
Does unum.com use SPF, DKIM, and DMARC email authentication?
unum.com enforces all three email authentication standards: SPF, DKIM, and DMARC (policy: reject). This is the gold-standard configuration. It means receivers can verify that mail claiming to come from @unum.com is genuine, and unum.com's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to unum.com bounce or get blocked?
Bounces from unum.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 unum.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 unum.com's receivers trust you.
How can I verify a large list of unum.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of unum.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, unum.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 unum.com email addresses?
Yes, with normal hygiene. unum.com is a legitimate email service and signups from @unum.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 unum.com by default.
What email format does unum.com use for usernames?
Most unum.com mailboxes follow common patterns like first.last@unum.com, firstinitiallast@unum.com, or first@unum.com, but the actual local-part rules depend on Unum Group. The only reliable way to confirm whether a specific @unum.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 unum.com risk score calculated?
The 0-to-100 risk score for unum.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 unum.com score is recomputed on every audit so it always reflects the live state of the domain.
Is unum.com a valid corporate email domain?
Yes, unum.com is the official corporate email domain for Unum Group. It is used for internal business communications and is not available for public registration.
Is unum.com a disposable or temporary email provider?
No, unum.com is a corporate email domain belonging to Unum Group, used exclusively by employees and authorized personnel.
What mail server does unum.com use?
unum.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to unum.com addresses?
B2B marketing to unum.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 unum.com?
Corporate domains like unum.com may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.