mail-tester.com
Issued by Let's Encrypt Authority X1
About this certificate
This digital certificate with serial number 01:81:19:47:a2:35:de:a4:e9:b5:98:9f:11:e2:0a:00:78:44 was issued on by Let's Encrypt.
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=mail-tester.com
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 01:81:19:47:a2:35:de:a4:e9:b5:98:9f:11:e2:0a:00:78:44Serial Number (int): 131042313907551240747486067393777589319748
Serial Number lenght: 137 bits, 18 octets
SubjectKeyId: 3f:83:6a:11:c6:bb:c8:99:01:98:69:08:14:52:89:f8:ec:b0:06:b7
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): fc:9b:0c:6c:38:2e:8b:cb:c5:4f:ee:63:66:85:0c:3d:ee:76:a0:93
Fingerprint (sha256): 07:e4:0a:a5:13:a7:5d:af:44:d0:76:97:77:16:27:e8:8b:e9:af:1c:40:b5:a7:e6:0b:07:d3:9f:38:ce:63:c0
Issuing Certificate URL: http://cert.int-x1.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x1.letsencrypt.org/Check the revocation status for certificate mail-tester.com
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for mail-tester.com
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
8 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
mail-tester.com
www.mail-tester.com
www.mail-tester.com
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www.mail-tester.com
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mail-tester.com
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check.bulkmail.co.za
mail-tester.com
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mail-tester.com
mail-tester.com
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dev.mail-tester.com
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mail-tester.com
mail-tester.com
mail-tester.com
mail-tester.com
check.bulkmail.co.za
mail-tester.com
mail-tester.com
mail-tester.com
mail-tester.com
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mail-tester.com
mail-tester.com
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mail-tester.com
mail-tester.com
mail-tester.com
Certificate
The complete raw certificate details for mail-tester.com in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGFzCCBP+gAwIBAgISAYEZR6I13qTptZifEeIKAHhEMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMTAeFw0xNTEyMjIxMzQyMDBaFw0x NjAzMjExMzQyMDBaMBoxGDAWBgNVBAMTD21haWwtdGVzdGVyLmNvbTCCAiIwDQYJ KoZIhvcNAQEBBQADggIPADCCAgoCggIBAJfb9QpPchGAOW8XmfYE0rmDsKE5ZGk1 P9oGhoJZLyxBKFdT3R8Q1M5KWbLrbTwoemAAX/Nt3V1cptFMtWMCKIQR3iKy9ql2 VvSIxyi2PgwoTfX4buN9XGSY74Aywu8PFvYDwsrJOGxOuXDIQyk53l0ezlXXKvEF nMCBq5Pp8tYxHZ0P1iCsmcN942z/W76TJ0HZtqD8t5hLRIYDd6nWvHCWjwndSN/M hb25J0PBHA/bkr/hdJBy7Ykn+Kt75aT9KnXwrbXaNkSWhWXTSNCGbV9PVKJuGKd0 irYm76+vkBnJnSwf05xRY9xf7yVk/g2yW36LsZ3IMsaZUiClimtf4xKViS/tQvtl FsrdTZDsW0eCqj8+E5F/udMY5uagGtzEaMKcqXBLK+E4uYsTDptyhrUz72ZpYhLn Ck2annv79mzazjsX6HOdawSiQ7wcaZkvPFW1KWbrAvLuztTKJootKtKc2AwTTxps eHixiMKexC4fjnhYQpnwwo7O6knoAFcA/fvicanEAernabWITGR299OulyAIhzts jVz17B2gajhSE51V4dMcg3t+h8COf/fwUD3hU6Tm3TMTg1kVzDrH+luGrb+Edz6B OMdwFFqbARBPUN5w0FLbk1z86u6XE9/tLy9EEjV5Kcc+YCxhC+t4hRxyw71XD+on 7/6PlWRG9x9XAgMBAAGjggIlMIICITAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFD+D ahHGu8iZAZhpCBRSifjssAa3MB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/z qOyhMHAGCCsGAQUFBwEBBGQwYjAvBggrBgEFBQcwAYYjaHR0cDovL29jc3AuaW50 LXgxLmxldHNlbmNyeXB0Lm9yZy8wLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu dC14MS5sZXRzZW5jcnlwdC5vcmcvMC8GA1UdEQQoMCaCD21haWwtdGVzdGVyLmNv bYITd3d3Lm1haWwtdGVzdGVyLmNvbTCB/gYDVR0gBIH2MIHzMAgGBmeBDAECATCB 5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2Vu Y3J5cHQub3JnMIGrBggrBgEFBQcCAjCBngyBm1RoaXMgQ2VydGlmaWNhdGUgbWF5 IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkgUmVseWluZyBQYXJ0aWVzIGFuZCBvbmx5 IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUgQ2VydGlmaWNhdGUgUG9saWN5IGZvdW5k IGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQub3JnL3JlcG9zaXRvcnkvMA0GCSqGSIb3 DQEBCwUAA4IBAQBMajru5s4F9PDe3F1OJPvgEzzlSJAaRoapHse0tB7CStbsRiOj FfxBNyzfjwrU5TDBQO8XkkXMgJpJsQGEZkx1ubHqxwexwup1k7b+URkJjNerU1ms LiGLAvyWrVUWbhiFQKI/vDmibrXtfFAIEnCyTzAqzaujO5iKlQrTuGWcRl/c/hzi qKsDZil9hTditZYKbbHCXXCCaqMHZNtaKWl4BEDDFjC7oOnxkgY3VM/+Y/1EQrdp z0WgBFoDySn6PVfLncDFU5ydKqhM5x2Y6XcSnnVQ58iiflOZr7Ioc+ResmcdmG/Z fCaJQK7uxjG5lUrEyewzSCpwwoKbIk2eIUcl -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAl9v1Ck9yEYA5bxeZ9gTS uYOwoTlkaTU/2gaGglkvLEEoV1PdHxDUzkpZsuttPCh6YABf823dXVym0Uy1YwIo hBHeIrL2qXZW9IjHKLY+DChN9fhu431cZJjvgDLC7w8W9gPCysk4bE65cMhDKTne XR7OVdcq8QWcwIGrk+ny1jEdnQ/WIKyZw33jbP9bvpMnQdm2oPy3mEtEhgN3qda8 cJaPCd1I38yFvbknQ8EcD9uSv+F0kHLtiSf4q3vlpP0qdfCttdo2RJaFZdNI0IZt X09Uom4Yp3SKtibvr6+QGcmdLB/TnFFj3F/vJWT+DbJbfouxncgyxplSIKWKa1/j EpWJL+1C+2UWyt1NkOxbR4KqPz4TkX+50xjm5qAa3MRowpypcEsr4Ti5ixMOm3KG tTPvZmliEucKTZqee/v2bNrOOxfoc51rBKJDvBxpmS88VbUpZusC8u7O1Momii0q 0pzYDBNPGmx4eLGIwp7ELh+OeFhCmfDCjs7qSegAVwD9++JxqcQB6udptYhMZHb3 066XIAiHO2yNXPXsHaBqOFITnVXh0xyDe36HwI5/9/BQPeFTpObdMxODWRXMOsf6 W4atv4R3PoE4x3AUWpsBEE9Q3nDQUtuTXPzq7pcT3+0vL0QSNXkpxz5gLGEL63iF HHLDvVcP6ifv/o+VZEb3H1cCAwEAAQ== -----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 131042313907551240747486067393777589319748 . . . . . . . . [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 '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 (organizationName) . . . . . . . . . . . . . . . . . . . . [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 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt Authority X1' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2015-12-22 13:42:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-03-21 13:42:00 +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:19|false] PrintableString 'mail-tester.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 619531516144402868462513023707507219442950528099487097356258933639482413691730926443103698573324698285051310112743246348451549664210589252125300826747144027997984402994794033537574415783973900806557009508681042368134894541565801812941861087608965386449594200705928327394228192794110793197122435897615146264467767138292559706633578537843379239509244589626995907524954171528345089718025712318895793851127632365116814134942480683969664688622556675214346621992122613575746124964873465700205706758341160164981942522213471201479472385043655551232577726697478172199198061668372568013144052794431338914576268924848214602630367332066733733603787571665830137109625909114054216627948007084711229974442427644032585636001648885311032809821978802377701487848365267926546118867913118941302834926527432018452480706416571970832306386485025240574255358313269742702226417326829367464696149797478190719523609930425386430088220970688673959657838698544847795992107895570697231831380714891319458003887231626584419411122585015467239371671149681711919627258291868421504703059387065330333656955590384180677035551266639158549173528534112603991001762128521422211173124049045708260784602107757036631181515227345055566527152165310632806069560270360342438570565463 . . . . . . . . . . . . . . . . . . . . [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 (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 2.5.29.37 (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 2.5.29.19 (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 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 3f836a11c6bbc89901986908145289f8ecb006b7 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [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 (100 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.int-x1.letsencrypt.org/' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://cert.int-x1.letsencrypt.org/' . . . . . . . . . . . . . . . . [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 (40 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail-tester.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.mail-tester.com' . . . . . . . . . . . . . . . . [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 (246 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 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'http://cps.letsencrypt.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . [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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