DNS Report: preprints.org

Generated: 2026-08-10T04:11:24-05:00

75/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/302 IPv4 address(es) detected.
OKIPv6 (AAAA)10/102 IPv6 address(es) detected.
OKName server redundancy20/206 NS record(s); 2 or more required.
OKSOA record10/10Authoritative zone record.
ERRORDNSSEC chain0/15Both DS and DNSKEY are required.
ERRORCAA policy0/5Certificate authority restriction.
ERRORDNS propagation0/10Agreement between public resolvers.
OKMX records20/201 MX record(s).
OKSPF25/25SPF policy published.
OKDMARC25/25DMARC policy published.
OKDKIM20/20A DKIM selector was verified.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/5549 day(s) remaining.
OKCertificate lifetime10/10Full points require at least 30 days remaining.
WARNINGHTTP security headers4/351 of 9 evaluated headers detected.
OKPTR reverse DNS30/30PTR: a23-33-29-141.deploy.static.akamaitechnologies.com
OKIPv4 diversity35/35Two or more IPv4 addresses receive full points.
OKIPv6 connectivity35/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
ERRORHTTP response0/40HTTP/2 403
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
23.33.29.141
23.33.29.133
AAAA
2600:1407:7400:14::17d7:be7
2600:1407:7400:14::17d7:be4
CNAME
MX
10 mail.mdpi.com.
TXT
"v=spf1 mx ip4:195.65.194.219 ip4:212.243.204.40 include:spf.mdpi.com -all"
NS
a8-66.akam.net.
a3-64.akam.net.
a26-65.akam.net.
a6-66.akam.net.
a1-160.akam.net.
a5-67.akam.net.
SOA
a1-160.akam.net. hostmaster.preprints.org. 2024112804 3600 600 604800 300
CAA
DS
DNSKEY
RRSIG
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP