HOW.IS
?

How is lync.com?

Be careful risk 20/100

Registered 32 years ago, on no blocklists we checked, no valid HTTPS certificate, the site did not answer (SSLCertVerificationError).

Why

02050100
finecarefulhigh risk
  • +20No valid HTTPS certificate.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

Site
down
SSLCertVerificationError
HTTPS
invalid
certificate not read
Age
32 years
registered 1995-03-21
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A20.112.250.133
20.70.246.20
20.231.239.246
20.236.44.162
20.76.201.171
NSns3-34.azure-dns.org
ns1-34.azure-dns.com
ns2-34.azure-dns.net
ns4-34.azure-dns.info
TXTv=spf1 -all
CAA{'type': 'CAA', 'issue': 'globalsign.com', 'critical': 0}
{'type': 'CAA', 'issue': 'entrust.net', 'critical': 0}
{'type': 'CAA', 'iodef': 'mailto:domains@microsoft.com', 'critical': 0}
{'type': 'CAA', 'issue': 'digicert.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'contactemail': 'caarecordaware@microsoft.com'}
{'type': 'CAA', 'issue': 'microsoft.com', 'critical': 0}
RegistrationMarkMonitor Inc.
registrarMarkMonitor Inc.
registered1995-03-21
expires2027-03-22
last changed2026-04-29
ownerMicrosoft Corporation
nameserversns1-34.azure-dns.com
ns2-34.azure-dns.net
ns3-34.azure-dns.org
ns4-34.azure-dns.info
statusclient delete prohibited
client transfer prohibited
client update prohibited
server delete prohibited
server transfer prohibited
server update prohibited
registered 1995-03-21expires 2027-03-22
HTTPS certificatenot valid
validno
issuerMicrosoft Corporation
coversreroute443.microsoft.com
protocolTLSv1.3
issued 2026-10-11expires 2027-01-19
DNSSECsecure

Domain is properly signed — chain validated by an independent validating resolver

. → com → lync.com
Email authenticationfair
SPFpass v=spf1 -all
DMARCpass policy reject
DKIMnone of 1 common selectors

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade B · 155/205
Basic Security
20/40missing: DNSSEC Enabled
Record Security
45/45missing: DKIM Presence
Advanced Security
5/25missing: Mail Server Configuration, SOA Record Configuration, IPv6 Support
Domain Reputation
50/50
Threat Detection
35/45missing: Fast-Flux Detection, Domain Age Check
Blocklists0 listings · 17 lookups
SURBL MultidomainURIBL MultidomainSpamCop20.76.201.171Barracuda20.76.201.171UCEPROTECT Level 120.76.201.171SpamCop20.70.246.20Barracuda20.70.246.20UCEPROTECT Level 120.70.246.20SpamCop20.112.250.133Barracuda20.112.250.133UCEPROTECT Level 120.112.250.133SpamCop20.236.44.162Barracuda20.236.44.162UCEPROTECT Level 120.236.44.162SpamCop20.231.239.246Barracuda20.231.239.246UCEPROTECT Level 120.231.239.246

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.

curl "https://how.is/v1/domain/trust?domain=lync.com" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=lync.com"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on lync.com. Reference: /llms.txt.

IPv6. IPv6 readiness grade for lync.com Does lync.com work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch lync.com. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.

Watch — $1 / 30 days