Deliverability score
zerobounce.net
Excellent: this domain’s email setup is hardened end to end.
Scored 98 of 100 across 16 checks: 15 passed, 1 note.
- Mail: Google Workspace
- SPF 8/10 lookups
- DMARC p=reject
- Gmail/Yahoo DNS rules: met
zerobounce.net email and security report
All 20 checks for zerobounce.net on one page, last run October 15, 2026; DNS, website and WHOIS checks repeat every 14 days.
By using these tools you accept the Terms and the Privacy page.
Full report · Domain
zerobounce.net
3 of 20 checks need attention; none failed. 4 passed with things to tighten.
Checked Oct 15, 2026; next free refresh due Oct 29, 2026.
Up to 5 re-checks a day per network.
- 3 need attention
- 14 passed
- 3 for information
Spamhaus intelligencezerobounce.net
Reputation +15.9 Positive: Spamhaus’s own score rates this domain as reputable.
- Tags
- corporate
- Registered
- Jan 24, 2017 at Cloudflare, Inc.
- Expires
- Sep 19, 2032
- Last seen
- Oct 14, 2026
- Human score
- +10
- Identity score
- +2
- Infrastructure score
- +2.87
- SMTP score
- +1
Tags are Spamhaus’s labels for the domain: what kind of domain it is, and kinds of abuse Spamhaus has seen involving it, including abuse by others (large providers’ domains are often misused in phishing and spam). They describe what was seen, not a verdict; the score is Spamhaus’s overall assessment.
Scores: positive is good, negative is bad, 0 is neutral. The overall score combines the dimensions (human, identity, infrastructure, malware, SMTP).
From the Spamhaus Intelligence API on Oct 15, 2026. It is asked again only when someone presses Re-check.
AI intelligencezerobounce.netOpen full profile
Safe The verdict is safe because Google Safe Browsing, VirusTotal's 92 vendors and all 9 responding domain blocklists show no problems, Spamhaus's reputation score is positive, and the domain has been registered for 9 years.
Software or service · Says it is run by ZeroBounce (Santa Barbara, California, US)
ZeroBounce is an email validation and deliverability platform offering list cleaning, email verification, an email finder, warmup, inbox placement testing, blacklist and DMARC monitoring. It serves marketers, agencies, developers and enterprises who want to reduce bounces and improve inbox placement.
Background: ZeroBounce is a U.S.-based email verification company that is widely used for email list cleaning and deliverability. (from the model’s own knowledge, not our checks)
Worth knowing: The domain publishes a strict DMARC policy (p=reject) along with SPF and DKIM, which fits a company that sells email deliverability tools.
Why this verdict
Pass: Google Safe Browsing doesn’t list it.
Pass: None of the 92 security vendors on VirusTotal flag it.
Pass: It isn’t on any of the 9 domain blocklists that answered.
Pass: Spamhaus’s reputation score for it is positive (+15.9).
Pass: It was registered 9 years ago.
Written by Claude Sonnet 5.5 (high confidence) from this site’s checks Oct 15, 2026, 1:15 PM UTC. The verdict comes from fixed rules over the checks, not from the model. AI text can be wrong; the checks it used are listed on the AI intelligence page.
Setup at a glance
- Mail provider
- Google Workspace
- Mail servers (MX)
- aspmx.l.google.com, alt1.aspmx.l.google.com +3 more
- SPF
- -all
- DKIM
- cf2024-1 (2048-bit RSA), email (2048-bit RSA) +7 more
- DMARC
- p=reject
- DMARC reports
- Own address (zerobounce.net!5k)
- MTA-STS
- enforce mode
- TLS-RPT
- Published
- BIMI
- Published with a VMC
- DNSSEC
- On
- DNS hosting
- Cloudflare (likely, custom name servers)
- CDN
- Cloudflare (proxied)
- Registrar
- Cloudflare, Inc
- Registered
- 2017-01-24
- Expires
- 2032-09-19
- Website network
- AS13335 Cloudflare, Inc. (US)
- TLS certificate
- GlobalSign nv-sa, expires 2026-12-19
- Technologies
- Atlassian Statuspage, Cloudflare, Cloudflare Bot Management, Google Tag Manager, Google Workspace +9 more
- Blocklists
- Not listed
- VirusTotal
- Clean
- Google Safe Browsing
- Not listed
- Spamhaus reputation
- +15.9
- AI verdict
- Safe · software or service
Email authentication2 to tighten
Sender requirements checker
zerobounce.net
Meets
Meets the Gmail, Yahoo and Microsoft sender rules that DNS can show.
The rest depends on the mail you send: send a test message to check alignment, TLS, unsubscribe headers and the sending IP.
- Gmail: meets
- Yahoo: meets
- Microsoft: meets
SPF checker
zerobounce.net
The SPF record is valid and within every limit.
8 of 10 lookups, -all, 393,920 IPv4 addresses and 6 IPv6 ranges listed.
- 8/10 lookups
- -all
- 393,920 IPv4 addresses
DKIM checker
zerobounce.net
9 DKIM keys found; 3 could be stronger.
Tried 60 selectors; found k1, smtpapi, mte1, mte2, mandrill, cf2024-1, zendesk1, zendesk2, email.
- k1: RSA 1024 bits
- smtpapi: RSA 1024 bits
- mte1: RSA 2048 bits
- +6 more
- Warning: k1, smtpapi, mandrill: 1024-bit RSA key
DMARC checker
zerobounce.net
Spoofed mail is rejected: DMARC is fully enforced.
Published at _dmarc.zerobounce.net. p=reject, aggregate reports to 1 address.
- p=reject
- Reports to 1 address
- Warning: Report size limit (!5k)
BIMI checker
zerobounce.net
BIMI is ready, with a Verified Mark Certificate.
Every check passed. Gmail and Apple Mail require a VMC or CMC, and this domain publishes one. Each provider still decides per message, based on DMARC and sender reputation.
- VMC certificate
DANE checker
zerobounce.net
Optional
DANE isn’t set up for this domain.
Mail to zerobounce.net uses opportunistic TLS: encrypted when possible, but a network attacker can strip it. The mail servers’ own DNS isn’t DNSSEC-signed, so DANE can’t be added for them; if they belong to your mail provider, only the provider can enable it. Missing DANE doesn’t break mail.
- 5 mail servers
- MX signed (DNSSEC)
- 0 with DANE
Reputation1 to tighten
Blacklist check
zerobounce.net
Not listed
No listings found for zerobounce.net.
The domain and its 10 mail and web addresses were checked against 38 blocklists. 1 lookup couldn’t be checked and count as unknown, not clean. Allow-listed on SPFBL whitelist.
- Domain + 10 addresses
- 38 lists
- 1 unknown
- Warning: 1 lookup couldn’t be checked
VirusTotal check
zerobounce.net
Clean
No security vendor flags zerobounce.net.
57 of 92 rate it harmless and the rest have no opinion. A clean result isn’t a guarantee: new phishing sites can be missed for hours. Last analysed Oct 9, 2026.
- 0 malicious
- 0 suspicious
- 92 vendors
Google Safe Browsing check
zerobounce.net
Not listed
Google’s Safe Browsing lists don’t include zerobounce.net.
Checked the site’s home address against Google’s malware, phishing and unwanted-software lists. Google’s site status, which also counts single pages, found no unsafe content on zerobounce.net. New threats can take hours to be listed.
- Home address
- Site status: No unsafe content found
- Google Web Risk
Disposable email check
zerobounce.net
Not disposable
zerobounce.net isn’t on the disposable lists.
That doesn’t prove the address is real: new throwaway services appear every day.
- 97,385 listed domains
- Accepts mail (5 MXs)
Website3 need attention, 1 to tighten
Redirect trace
http://zerobounce.net/
Clean
The link goes to www.zerobounce.net after 2 redirects.
The page is titled “Email Validation Tools & Email List Cleaning | ZeroBounce”. No domain in the chain is on Cloudflare’s malware and phishing blocklist.
- 2 redirects
- Ends at HTTP 200
- 2 domains
TLS checker
zerobounce.net
Solid TLS, with 2 things to tighten.
TLS 1.3 and TLS 1.2 enabled, 15 cipher suites accepted, the certificate runs for 65 more days.
- TLS 1.3, 1.2
- Certificate: 65 days left
- Warning: Some suites lack forward secrecy
- Warning: CBC suites offered over TLS 1.2
Security headers
https://zerobounce.net/
Solid headers, with one thing to tighten.
Scored 78 of 100: 8 passed, 1 need attention.
- HSTS preload
- CSP weak
- HTTP 200
- Warning: Content-Security-Policy
Core Web Vitals check
zerobounce.net
Needs improvement
www.zerobounce.net doesn’t pass Core Web Vitals on phones or desktops.
All devices combined are in Google’s good range over the 28 days to Oct 12, 2026, but Google Search Console reports phones and desktops separately: on phones, LCP needs improvement at 2.80 s and INP needs improvement at 206 ms; on desktops, CLS needs improvement at 0.11 (good is LCP 2.50 s, INP 200 ms and CLS 0.10 or less).
- LCP 2.19 s
- INP 95 ms
- CLS 0.10
- Whole site
- Chrome UX Report
- Warning: Doesn’t pass on phones
- Warning: Doesn’t pass on desktops
Tech stack detector
https://zerobounce.net/
32 technologies
www.zerobounce.net runs on Next.js and Cloudflare.
32 technologies across 17 categories.
- WordPress
- Next.js
- Cloudflare
- Cloudflare Bot Management
Broken link checker
https://zerobounce.net/
Warning
No broken links among the 20 checked, but 1 redirect to update.
20 of 84 same-site links requested, 12 external domains looked up in DNS.
- 133 links
- 20 pages requested
- 12 external domains
- Warning: 1 link with an empty href
Domain and networkNothing to fix
Domain analyzer
zerobounce.net
22 services
zerobounce.net uses 22 services across 10 categories.
Mail by Google Workspace, DNS at Cloudflare (likely, custom name servers), web through Cloudflare (proxied). Registered with Cloudflare, Inc. until Sep 19, 2032.
- Mail: Google Workspace
- DNS: Cloudflare (likely, custom name servers)
- CDN: Cloudflare (proxied)
WHOIS lookup
zerobounce.net
Registered
zerobounce.net is registered with Cloudflare, Inc.
Created Jan 24, 2017 (9.7 years ago). Expires Sep 19, 2032, 2,165 days left.
- Cloudflare, Inc
- Since 2017
- Expires Sep 19, 2032
ASN lookup
104.18.144.198
AS13335
AS13335 · Cloudflare, Inc.
104.18.144.198 is in 104.18.144.0/20 announced by AS13335 (United States, registered with ARIN on Jul 14, 2010). The route is RPKI valid.
- 104.18.144.0/20
- United States
- RPKI valid
Change historysince October 15, 2026
- First checkedMail: Google Workspace · SPF -all · DMARC p=reject · DKIM: cf2024-1, email, k1 +6 more · Registrar: Cloudflare, Inc