Domain Intelligence
Last Updated:
Macmillan.com
Safe to Send
Macmillan.com is operated by Macmillan Publishers. The domain runs 5 mail exchanges and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
5
/100
Low
Verify Mailbox
Verify @macmillan.com emails
Live SMTP handshake against macmillan.com 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
Compliance approved this in two weeks thanks to SOC 2 Type II and the GDPR documentation. Verification accuracy holds at the advertised 99%+ across our 80k physician contact list. Dana Mehta · IT Director, Healthcare
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
5
Mail exchangers
Mail Exchange (MX) Records for macmillan.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
aspmx.l.google.com 172.253.115.27
Reachable
#5
alt2.aspmx.l.google.com 172.253.116.27
Reachable
#5
alt1.aspmx.l.google.com 108.177.123.26
Reachable
#10
alt4.aspmx.l.google.com 173.194.76.27
Reachable
#10
alt3.aspmx.l.google.com 192.178.223.26
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 mx.google.com ESMTP d75a77b69052e-5148e82ad70si130804871cf.179 - gsmtp
Primary mail server accepted SMTP connection and returned a banner during the live audit.
macmillan.com 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 ip4:52.7.149.29 ip4:107.23.18.111 ip4:5.148.96.11/24 ip4:199.168.15.14/24 ip4:63.137.180.132/28 ip4:66.231.80.37/32 ip4:153.95.95.86 ip4:13.108.254.128/28 ip4:13.108.238.128/28 ip4:54.72.226.88/32 ip4:153.95.95.88 ip4:208.86.168.7 ip4:135.84.68.123 ip4:206.152.14.54 ip4:87.252.58.130 ip4:18.168.51.200 ip4:167.89.36.126 ip4:74.91.86.17 ip4:62.159.91.220 ip4:54.194.158.17 ip4:3.232.179.211 ip4:52.200.229.192 ip4:52.49.188.207 ip4:18.202.90.140 ip4:208.74.204.0/22 IP4:184.173.31.139 ip4:184.173.31.138 include:_spf.google.com include:mktomail.com include:_spf.salesforce.com include:servers.mcsv.net include:amazonses.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;rua=mailto:9tydwhpb@ag.dmarcian.com;ruf=mailto:9tydwhpb@fr.dmarcian.com;
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
macmillan.com Domain Registration WHOIS · Nameservers · Registrar
RegistrarENOM, INC.
IANA ID48
RegisteredAugust 11, 1994
Last UpdatedApril 20, 2026
ExpiresAugust 10, 2027
Age31 years
TLD.com
Authoritative Nameservers (4)
- NS-1482.AWSDNS-57.ORG
- NS-1891.AWSDNS-44.CO.UK
- NS-334.AWSDNS-41.COM
- NS-628.AWSDNS-14.NET
Registrant
Hidden by registrar privacy service
Technical Contact
Hidden by registrar privacy service
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Common Questions About macmillan.com
Is macmillan.com a disposable or temporary email provider?
No. macmillan.com is not a disposable email provider. It is classified as Corporate Email operated by Macmillan Publishers and addresses on macmillan.com are persistent rather than throwaway. Mail sent to a valid macmillan.com mailbox reaches a real recipient.
How do I verify if a macmillan.com email address is valid?
The fastest way to verify a macmillan.com email address is to use our free email checker. Enter any @macmillan.com mailbox at the top of this page and our system performs a real-time SMTP handshake against macmillan.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 macmillan.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to macmillan.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 macmillan.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for macmillan.com?
macmillan.com currently publishes 5 mail exchange (MX) records. The primary MX is aspmx.l.google.com, which is the first server contacted when other mail systems try to deliver email to a macmillan.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 macmillan.com.
Does macmillan.com use SPF, DKIM, and DMARC email authentication?
macmillan.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 @macmillan.com is genuine, and macmillan.com's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to macmillan.com bounce or get blocked?
Bounces from macmillan.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 macmillan.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 macmillan.com's receivers trust you.
How can I verify a large list of macmillan.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of macmillan.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, macmillan.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 macmillan.com email addresses?
Yes, with normal hygiene. macmillan.com is a legitimate email service and signups from @macmillan.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 macmillan.com by default.
What email format does macmillan.com use for usernames?
Most macmillan.com mailboxes follow common patterns like first.last@macmillan.com, firstinitiallast@macmillan.com, or first@macmillan.com, but the actual local-part rules depend on Macmillan Publishers. The only reliable way to confirm whether a specific @macmillan.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 macmillan.com risk score calculated?
The 0-to-100 risk score for macmillan.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 macmillan.com score is recomputed on every audit so it always reflects the live state of the domain.
Is macmillan.com a valid corporate email domain?
Yes, macmillan.com is the official corporate email domain for Macmillan Publishers. It is used for internal business communications and is not available for public registration.
Is macmillan.com a disposable or temporary email provider?
No, macmillan.com is a corporate email domain belonging to Macmillan Publishers, used exclusively by employees and authorized personnel.
What mail server does macmillan.com use?
macmillan.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to macmillan.com addresses?
B2B marketing to macmillan.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 macmillan.com?
Corporate domains like macmillan.com may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.