Domain Intelligence
Last Updated:
Fastly Email Verification
Safe to Send
Fastly.com is operated by Fastly Inc.. 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 @fastly.com emails
Live SMTP handshake against fastly.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
Switched after a billing dispute with NeverBounce. Same SMTP results on a 5k test sample. The MX, SPF, DKIM lookup tools are a hidden value-add for debugging client deliverability complaints. James Wexler · Growth Engineer
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 fastly.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.
#10
aspmx.l.google.com 172.253.62.26
Reachable
#20
alt2.aspmx.l.google.com 172.253.116.27
Reachable
#20
alt1.aspmx.l.google.com 108.177.123.26
Reachable
#30
aspmx3.googlemail.com 172.253.116.26
Reachable
#30
aspmx2.googlemail.com 108.177.123.26
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 af79cd13be357-910bb26e28bsi1338646185a.137 - gsmtp
Primary mail server accepted SMTP connection and returned a banner during the live audit.
fastly.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 ip4:192.254.122.132 ip4:199.27.72.0/21 ip4:168.245.55.99 include:_spf.google.com include:stspg-customer.com include:mail.zendesk.com include:_spf.salesforce.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:mailauth-reports@fastly.com,mailto:dmarc_agg@vali.email;
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
fastly.com Domain Registration WHOIS · Nameservers · Registrar
RegistrarMarkMonitor, Inc.
IANA ID292
RegisteredJuly 8, 2002
Last UpdatedJune 6, 2025
ExpiresJuly 7, 2027
Age23 years
TLD.com
Authoritative Nameservers (8)
- ns-cloud-a1.googledomains.com
- ns-cloud-a4.googledomains.com
- ns-cloud-a2.googledomains.com
- edns1.ultradns.biz
- edns1.ultradns.org
- edns1.ultradns.net
- edns1.ultradns.com
- ns-cloud-a3.googledomains.com
Registrant
Domain Administrator
DNStination Inc.
admin@dnstinations.com·San Francisco, CA, UNITED STATES·14155319335
Technical Contact
Domain Administrator
admin@dnstinations.com·UNITED STATES·14155319335
About this Domain
About fastly.com
Fastly Inc. (fastly.com) is an edge cloud platform company headquartered in San Francisco, California. Fastly provides a content delivery network, edge computing, security, and video streaming services. The platform powers major websites and applications by delivering content from edge servers positioned close to end users for faster performance.
Fastly implements email authentication on the fastly.com domain with SPF, DKIM, and DMARC enforcement. As a CDN and edge security provider, Fastly maintains strong email authentication to protect its corporate communications and demonstrate the security standards expected of infrastructure providers.
Email verification against fastly.com returns definitive responses for valid and invalid mailboxes. The domain does not operate as catch-all. Fastly's mail infrastructure implements rate limiting on inbound SMTP connections.
For partners communicating with Fastly employees, proper sender authentication improves deliverability. Fastly's corporate email filters enforce SPF, DKIM, and DMARC validation. Authentication compliance ensures reliable inbox delivery to fastly.com addresses.
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More Email Verification Tools
Free single-address checks, bulk uploads, and APIs for plugging email verification into your own product.
Common Questions About fastly.com
Is fastly.com a disposable or temporary email provider?
No. fastly.com is not a disposable email provider. It is classified as Corporate Email operated by Fastly Inc. and addresses on fastly.com are persistent rather than throwaway. Mail sent to a valid fastly.com mailbox reaches a real recipient.
How do I verify if a fastly.com email address is valid?
The fastest way to verify a fastly.com email address is to use our email checker. Enter any @fastly.com mailbox at the top of this page and our system performs a real-time SMTP handshake against fastly.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 fastly.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to fastly.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 fastly.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for fastly.com?
fastly.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 fastly.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 fastly.com.
Does fastly.com use SPF, DKIM, and DMARC email authentication?
fastly.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 @fastly.com is genuine, and fastly.com's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to fastly.com bounce or get blocked?
Bounces from fastly.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 fastly.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 fastly.com's receivers trust you.
How can I verify a large list of fastly.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of fastly.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, fastly.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 fastly.com email addresses?
Yes, with normal hygiene. fastly.com is a legitimate email service and signups from @fastly.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 fastly.com by default.
What email format does fastly.com use for usernames?
Most fastly.com mailboxes follow common patterns like first.last@fastly.com, firstinitiallast@fastly.com, or first@fastly.com, but the actual local-part rules depend on Fastly Inc.. The only reliable way to confirm whether a specific @fastly.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 fastly.com risk score calculated?
The 0-to-100 risk score for fastly.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 fastly.com score is recomputed on every audit so it always reflects the live state of the domain.
Is fastly.com a valid email domain?
Yes, fastly.com is the official corporate email domain for Fastly Inc.. It is used for internal business communications.
Is fastly.com a disposable or temporary email provider?
No, fastly.com is a corporate email domain belonging to Fastly Inc., used exclusively by employees and authorized personnel.
What mail server does fastly.com use?
fastly.com uses enterprise-grade mail infrastructure. Check the MX records section for specific mail server details.
Can I send marketing emails to fastly.com addresses?
B2B marketing to fastly.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 fastly.com?
Corporate domains like fastly.com may use catch-all configurations that accept all addresses. Use BulkEmailChecker advanced verification to detect catch-all behavior and validate individual mailboxes.