Is rackspace.com a valid email domain?
Mail for rackspace.com is handled by 1 server at Microsoft (Outlook or Microsoft 365), with rackspace-com.mail.protection.outlook.com tried first.
It is not a free provider and is not on our disposable list, so addresses here usually belong to a company, school or other organisation.
SPF is published and ends with -all. DMARC is set to reject.
Check an email address at rackspace.com
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MX records (Microsoft (Outlook or Microsoft 365))
| Priority | Mail server | Resolves to |
|---|---|---|
| 10 | rackspace-com.mail.protection.outlook.com | 52.101.41.54, 52.101.60.151 |
SPF
Record published
v=spf1 include:spf_a.rackspace.com include:spf_b.rackspace.com include:spf.protection.outlook.com include:mailgun.org -all
DMARC
Policy: reject
v=DMARC1; p=reject; fo=1; ri=3600; sp=reject; adkim=r; aspf=r; pct=100; rua=mailto:dmarc_agg@vali.email
Disposable?
No, not on our disposable list.
Free provider?
No, not a known free provider.
What this means for your email list
What this means for addresses at this domain
The domain accepts mail, but whether a given person's mailbox exists depends on that organisation. Company domains often have staff who left, role mailboxes like info@ and sales@, and sometimes catch-all rules that accept everything. Verify the individual address before you send.
Sender authentication
rackspace.com has a strict DMARC policy (reject): mail that fails authentication is refused, which protects its brand from spoofing and means anyone sending as rackspace.com must have SPF and DKIM set up correctly.
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Sign up to get a report summary →Frequently asked questions
- Is rackspace.com a valid email domain?
- Yes. rackspace.com publishes 1 MX record and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
- Is rackspace.com a disposable email domain?
- No. rackspace.com is not on our disposable list. The list is updated regularly, and new throwaway domains appear all the time.
- What are the MX records for rackspace.com?
- rackspace-com.mail.protection.outlook.com (priority 10).
- Does rackspace.com have SPF and DMARC?
- SPF: yes, ending -all. DMARC: yes, policy reject.