How is serving-sys.ru?

Be careful risk 20/100

Registered 7 years ago, no valid HTTPS certificate, the site did not answer (OSError).

Why

02050100

finecarefulhigh risk

+20No valid HTTPS certificate.

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

Site

down

OSError

HTTPS

invalid

Could not resolve host (ENODATA)

Age

7 years

registered 2019-08-15

Blocklists

listings across 1 lists; 1 did not answer

Everything we looked at

DNS records3 record types

MX	10 emx.mail.ru
NS	ns3.selectel.ru ns1.selectel.ru ns2.selectel.ru ns4.selectel.ru
TXT	ngenix-verification=c3b3ada03b534cf688a5b693ea3a0d3e yandex-verification: 8fefa47a466a55d5 yandex-verification: 57a8645a4fbec20c v=spf1 redirect=_spf.mail.ru

RegistrationREGRU-RU

registrar	REGRU-RU
registered	2019-08-15
nameservers	ns1.selectel.ru. ns2.selectel.ru. ns3.selectel.ru. ns4.selectel.ru.

HTTPS certificatenot valid

valid	no
problem	Could not resolve host (ENODATA)

DNSSECinsecure

Domain is not signed with DNSSEC

. → ru → serving-sys.ru

Email authenticationpoor

SPF	warning `v=spf1 redirect=_spf.mail.ru`
DMARC	none
DKIM	none of 1 common selectors

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

Security scoregrade C · 113/190

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

8/45missing: CAA Records, SPF Record, DMARC Record, DKIM Presence

Advanced Security

15/25missing: Mail Server Configuration, IPv6 Support

Domain Reputation

35/35

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 2 lookups

SURBL MultidomainURIBL Multidomain

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=serving-sys.ru" \ -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=serving-sys.ru"

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

IPv6. Does serving-sys.ru work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch serving-sys.ru. 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