DV SSL/TLS Certificate for mail.unfrei.org

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the mail.unfrei.org DV SSL/TLS Certificate

This certificate with serial number 05:d7:07:f5:2f:e5:c9:f1:12:a8:1c:87:a0:98:63:0d:f8:5f for mail.unfrei.org was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for mail.unfrei.org provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:d7:07:f5:2f:e5:c9:f1:12:a8:1c:87:a0:98:63:0d:f8:5f
Serial Number (int): 508732716226982836835219720934771351484511
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: e0:22:6c:b1:e1:e8:2c:33:35:e0:90:1e:75:67:f3:09:34:27:88:27
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): 96:40:c1:70:d3:49:20:e6:60:d8:39:6e:6c:ac:87:60:dc:0d:37:33
Fingerprint (SHA-256): 8c:cc:d7:6f:ed:5f:07:df:bf:d2:e4:7e:e7:d0:fb:a5:d8:cb:93:44:50:70:f8:ee:e6:aa:bd:8f:7c:d4:8c:9a

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/96.crl

Check the revocation status for certificate mail.unfrei.org
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for mail.unfrei.org

Public Key Algorithm
RSA
Key Size
4096
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for mail.unfrei.org in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGDDCCBPSgAwIBAgISBdcH9S/lyfESqByHoJhjDfhfMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNSMTEwHhcNMjUwNTIwMTMzMDI3WhcNMjUwODE4MTMzMDI2WjAaMRgwFgYDVQQD
Ew9tYWlsLnVuZnJlaS5vcmcwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoIC
AQDPIc3RFOGNNh06mDVXsLuwA5n/EIG/UuHN2nJVajeRNzHBrWSplU6/MrsX+6sB
fXZpeRuikoCVQlQMRFiq7J6c0fYRy3LeNfOXaEbv/HGEHO5CCM6JxXK84v6yud+D
BciNQ8Eh9YowD6YS2xQ8w2bQP7hFoFalUdeTSWwncoMPC1R9Fz/A9PxCxkkwsJ+3
rKh609wmDL12jTmNLhSzK+EEGXMDZztmMk13D3osKkWdn2wBWJ4tgJ+gXrBB9ioB
s0KQuvFw12p6ORbigsA5b2CtV6uXRk9acG11AEbBJlLlGsQqKIpAoG8k0sVl7yhc
DrM//1Us7OaiPNGO+abW9nVQTrGZ9GTig0zNdD8zgbni8Cicz5I5fFZubNGU3tZ/
SvOwtV+b6fiyKWiVhH8VxySXy1f3ppXDnvtuJY8a7ujMx46FYBde/l8j7/y2OE85
wYEwTJ4vPpKBJpsWEja81+JbBpCFHTBqa44ftQxwJq62usPRFbC+pzerUBIc7EGo
iolDxDzPlV2cskEjDSjCEU5LKtGkX/1LQT6ERUuRPsN5YEZ/5uAiX1GUspcCB4YJ
vN2B60hITm1BXUz1szyJ6YHY2y+j9AIvus9yB4EViSF4m9rmzexGYXIgpDYjEmN9
A4EXvv0sCCZyAAh9J/Z1dn3JB4BGqcYc5Nv0xdhL1Q84OQIDAQABo4ICMTCCAi0w
DgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAM
BgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTgImyx4egsMzXgkB51Z/MJNCeIJzAfBgNV
HSMEGDAWgBTFz0ak6vTDwHpslcQtsF6SLybjuTAzBggrBgEFBQcBAQQnMCUwIwYI
KwYBBQUHMAKGF2h0dHA6Ly9yMTEuaS5sZW5jci5vcmcvMC4GA1UdEQQnMCWCD21h
aWwudW5mcmVpLm9yZ4ISd2VibWFpbC51bmZyZWkub3JnMBMGA1UdIAQMMAowCAYG
Z4EMAQIBMC4GA1UdHwQnMCUwI6AhoB+GHWh0dHA6Ly9yMTEuYy5sZW5jci5vcmcv
OTYuY3JsMIIBAgYKKwYBBAHWeQIEAgSB8wSB8ADuAHUA7TxL1ugGwqSiAFfbyyTi
OAHfUS/txIbFcA8g3bc+P+AAAAGW7hj9qgAABAMARjBEAiB9jhntPTtL7EXSTXqv
YkNfY+CgLF8+U3tNR6xgueyzNgIgRlJIPINfIxv7O7nFjVnmtNXZ9dRZRuS0BXhQ
bRRkx9IAdQDd3Mo0ldfhFgXnlTL6x5/4PRxQ39sAOhQSdgosrLvIKgAAAZbuGQYQ
AAAEAwBGMEQCIARjBZ+fiwPaVdOcKeZUZOJ6RxSo8rRw6OC022wHK6SyAiAevCso
qXu6ssAdV/EhGITBZI2Wkn13cwQ3bIXJdyJdgjANBgkqhkiG9w0BAQsFAAOCAQEA
XcOlHSqJUzfolXL9KtU3E8XT2vBxEb1SSZgGN4C9ereuVfugWgKOOF6Nr99bjacT
7ZfZcujehJgs4QPfATpS8FR/QCsB7wckoaPp870gEouL6B/fvU4ShriWB8nC00Ig
hdNJp9nnatmVEso4rfNr75sIyRoJ2lKZF+XNBxzX8X/1hapJAA9cdOUcbymlo6PG
D+fHIOhmJp/QoIZ/LyK/WXLhbMc/2kwnCWzS2crZj+3Cx7OOHsEMqJv11X3KzJR1
noU+i4HAUcIV3hqKm/rsdxiQ3KDkge/jUJ0BJ9CPA+gggameJVGlUukD0U7JxGcq
7QJdaELjUHcyRWje0UBEPg==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----

ASN.1 Decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 508732716226982836835219720934771351484511
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [c:0|t:5|false] NULL []
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-05-20 13:30:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-08-18 13:30:26 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'mail.unfrei.org'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL []
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 845025025877580653205802289696215335342967088403216277055771892636271275962089081880231828715604118554917799076362299823544129765033702538273863487267974574268240488911241761681889677158642389162851644287115751827626570370841542069450495661254966277626022097125185336747214013394073745709825359789425290017476010400661093698630862150313016737855594651123561821569775322865550267708096087125090728685758291870745238428297832603140366707040608887824487321077899827776572795508082947992706046892959277060604651619000790992657207937495711655636768382093576108973539125241139284054264504945450624065843373998525195479175216287859903915745932378757156204490258398941527030354713569222443592504487502691119054243404123528799167539504152480063373382704742203194362355832842123594794365483722291825740100300617941236765240591681194562383965317617418612071846358135332522498566601356912126139151818047413560972632498745831264157697743086181957888996163780400780324904890184452942312349976894100561216005950431265959793101652572447118100592648676520340134112126506601969809310425744675361154813735241407720680473189015284129715759653977295397404033018102649900230273652333217675663928890960649854001605983109468877660628083184258410495580518457
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits)
							05a0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							e0226cb1e1e82c3335e0901e7567f30934278827
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.unfrei.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.unfrei.org'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.c.lencr.org/96.crl'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500ed3c4bd6e806c2a4a20057dbcb24e23801df512fedc486c5700f20ddb73e3fe000000196ee18fdaa000004030046304402207d8e19ed3d3b4bec45d24d7aaf62435f63e0a02c5f3e537b4d47ac60b9ecb33602204652483c835f231bfb3bb9c58d59e6b4d5d9f5d45946e4b40578506d1464c7d2007500dddcca3495d7e11605e79532fac79ff83d1c50dfdb003a1412760a2cacbbc82a00000196ee190610000004030046304402200463059f9f8b03da55d39c29e65464e27a4714a8f2b470e8e0b4db6c072ba4b202201ebc2b28a97bbab2c01d57f1211884c1648d96927d777304376c85c977225d82
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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