*.mailkit.com
Issued by Sectigo RSA Domain Validation Secure Server CA
About this certificate
This digital certificate with serial number 95:1f:61:d8:23:84:fc:79:49:b2:a4:f8:6e:1d:b0:d9 was issued on by Sectigo Limited.
With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.
We have idenified some issues with this certificate:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=*.mailkit.com
Sectigo Limited
Organization:
Sectigo Limited
State / Province:
Greater Manchester
Locality: Salford
Country: GB
Locality: Salford
Country: GB
This certificate has expire since
Certificate Details
Serial Number (hex): 95:1f:61:d8:23:84:fc:79:49:b2:a4:f8:6e:1d:b0:d9Serial Number (int): 198217917092574447837936153280252850393
Serial Number lenght: 128 bits, 16 octets
SubjectKeyId: 12:a3:36:ab:f8:51:d1:72:8a:07:56:20:23:ba:d7:8a:8e:fb:e0:71
AuthorityKeyId: 8d:8c:5e:c4:54:ad:8a:e1:77:e9:9b:f9:9b:05:e1:b8:01:8d:61:e1
Fingerprint (sha1): c0:b7:bb:ec:07:e7:cf:09:52:b8:d0:d7:0f:8a:7d:36:a4:56:0f:c9
Fingerprint (sha256): 25:be:d0:21:45:5d:bf:ad:40:4b:ac:32:a8:35:64:32:fd:13:c6:87:7b:0a:0d:c0:dc:14:17:fe:b9:fb:74:e1
Issuing Certificate URL: http://crt.sectigo.com/SectigoRSADomainValidationSecureServerCA.crt
Revocation information
OCSP Server: http://ocsp.sectigo.comCheck the revocation status for certificate *.mailkit.com
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for *.mailkit.com
Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
*.mailkit.com
mailkit.com
mailkit.com
Other certificates including the domain name mailkit.com
(limited to 100 certificates)
Certificate
The complete raw certificate details for *.mailkit.com in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGMDCCBRigAwIBAgIRAJUfYdgjhPx5SbKk+G4dsNkwDQYJKoZIhvcNAQELBQAw gY8xCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAO BgNVBAcTB1NhbGZvcmQxGDAWBgNVBAoTD1NlY3RpZ28gTGltaXRlZDE3MDUGA1UE AxMuU2VjdGlnbyBSU0EgRG9tYWluIFZhbGlkYXRpb24gU2VjdXJlIFNlcnZlciBD QTAeFw0yMjA3MjEwMDAwMDBaFw0yMzA4MTgyMzU5NTlaMBgxFjAUBgNVBAMMDSou bWFpbGtpdC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC15dCG zcnmOJAWiXUcjWJAiJACausRaC/9GhdsmU+TOPh0yRaoJkaqEQnB7GHbcFwdDOOv BdDdA6qqWnrpzDK3Jpm6IviSliQYSqz3FSuUKibefidh/IeJjTD1VW5E+xznrsOD wbEFfSsM4FosxHacmvUcqD8Va8LZMFAz/+xR/6SHQ0dlc4qV5ZgOQ19AoY2Rb3je 7yt+TfBBSn83hI4UkmhwHfNfc9biOde7Oa8yRIf+Z/R+NGMQwAvjKkcjGX+NwKlF R0emvFuyemlHmKV2enhqeKA0KgrvTWW4pzuiqDXJPzaX8hu2zxcPECQAP03A6ZdR WRyQ382ZErB8fEQPAgMBAAGjggL7MIIC9zAfBgNVHSMEGDAWgBSNjF7EVK2K4Xfp m/mbBeG4AY1h4TAdBgNVHQ4EFgQUEqM2q/hR0XKKB1YgI7rXio774HEwDgYDVR0P AQH/BAQDAgWgMAwGA1UdEwEB/wQCMAAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG AQUFBwMCMEkGA1UdIARCMEAwNAYLKwYBBAGyMQECAgcwJTAjBggrBgEFBQcCARYX aHR0cHM6Ly9zZWN0aWdvLmNvbS9DUFMwCAYGZ4EMAQIBMIGEBggrBgEFBQcBAQR4 MHYwTwYIKwYBBQUHMAKGQ2h0dHA6Ly9jcnQuc2VjdGlnby5jb20vU2VjdGlnb1JT QURvbWFpblZhbGlkYXRpb25TZWN1cmVTZXJ2ZXJDQS5jcnQwIwYIKwYBBQUHMAGG F2h0dHA6Ly9vY3NwLnNlY3RpZ28uY29tMCUGA1UdEQQeMByCDSoubWFpbGtpdC5j b22CC21haWxraXQuY29tMIIBfQYKKwYBBAHWeQIEAgSCAW0EggFpAWcAdQCt9776 fP8QyIudPZwePhhqtGcpXc+xDCTKhYY069yCigAAAYIffmowAAAEAwBGMEQCIEwc TjjhCgMbyQHqtkyLH7tn9zlOPt7ivctgF4QcpBjlAiBh25+P0wPGs5oe94v256SQ n3OxqUukTFAdOLMDOLxxeQB2AHoyjFTYty22IOo44FIe6YQWcDIThU070ivBOlej UutSAAABgh9+aiwAAAQDAEcwRQIgUuSlbyMRC4umqUvHuDzJOxSxQ0wmzGiyZIs0 PHmS8CICIQDgR32pmT6z2OaoC4NGmII5UQX2C67tlgiLejWr1FVUnQB2AOg+0No+ 9QY1MudXKLyJa8kD08vREWvs62nhd31tBr1uAAABgh9+adMAAAQDAEcwRQIgVi7V SBMLb314F5IqDWCx3jT6H2FndlnZPCUpZ1hCfQkCIQD3WNkyYjrYYqlhALKwCR8I EFN9N+47DS74Iy1d+857HDANBgkqhkiG9w0BAQsFAAOCAQEAwkueYR0NylH3LXR9 Fj0PML3Kn6RD1QDpNg4ZPnLuh8nvmC34k0FTuJhnxefVo7om0uW7cYK4X1j33LMQ 07eZiK4tjwuGsMkSbvkJVZAjsNKei3N7pVnY498ZwJCEobG0lDLUVjurFd2HpyuM gGsxAds5WIctyCfTHMw/L0hk1SjcAxQBja1Lu36AL9ihbNzcCL1J2MDJav3NM2Yj aXkFEifkC8gYBYvwWgy4Q5dGI906JIcueph1pKInn2sf+PsMqP+jPUf6vsXd5TFl 0y3MHoKcRxg5be15+zECKcu/8F74ZNB0UnLZfdeOvOEWe3wed76oDhModAhPsvLd FQE8Wg== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAteXQhs3J5jiQFol1HI1i QIiQAmrrEWgv/RoXbJlPkzj4dMkWqCZGqhEJwexh23BcHQzjrwXQ3QOqqlp66cwy tyaZuiL4kpYkGEqs9xUrlCom3n4nYfyHiY0w9VVuRPsc567Dg8GxBX0rDOBaLMR2 nJr1HKg/FWvC2TBQM//sUf+kh0NHZXOKleWYDkNfQKGNkW943u8rfk3wQUp/N4SO FJJocB3zX3PW4jnXuzmvMkSH/mf0fjRjEMAL4ypHIxl/jcCpRUdHprxbsnppR5il dnp4anigNCoK701luKc7oqg1yT82l/Ibts8XDxAkAD9NwOmXUVkckN/NmRKwfHxE DwIDAQAB -----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 198217917092574447837936153280252850393 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . . . . . [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 (countryName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'GB' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Greater Manchester' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Salford' . . . . . . . . . . . . [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 (organizationName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Sectigo Limited' . . . . . . . . . . . . [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 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Sectigo RSA Domain Validation Secure Server CA' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2022-07-21 00:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-08-18 23:59:59 +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 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String '*.mailkit.com' . . . . . . . . [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 (rsaEncryption) . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 22962458980595273918408236722825821234266039388282005112381802052944896418017067874798471653014206207393764843640318040523907531771550260871670046148477586492158612385798970865420877187402148923141293807160354684926606775056842153442123581091295908154392219347621897909605272415183916821596482749142149971418789755935770103481269312274283660829546683202260154691068303141067558727989294329262982591033979379412131747055992611265561171454217994016640581944151977511520234581411338184990767227421655541384231347668824181601613090864525402430650161119409454931432941568448171322082261097199171775436611633893354313106447 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 8d8c5ec454ad8ae177e99bf99b05e1b8018d61e1 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 12a336abf851d1728a07562023bad78a8efbe071 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage) . . . . . . . . . . . . . . . . . . . . [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 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [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 2.5.29.37 (extKeyUsage) . . . . . . . . . . . . . . . . . . . . [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 (serverAuth) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (66 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'https://sectigo.com/CPS' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (120 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 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.sectigo.com/SectigoRSADomainValidationSecureServerCA.crt' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.sectigo.com' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (30 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.mailkit.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mailkit.com' . . . . . . . . . . . . . . . . [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 (365 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (361 bytes) 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 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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