smtp.cus.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:42:a5:0e:ff:22:2f:d8:6e:80:82:30:aa:08:5f:48:9b:31 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=smtp.cus.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:42:a5:0e:ff:22:2f:d8:6e:80:82:30:aa:08:5f:48:9b:31
Serial Number (int): 284014894498246223037000813294923471690545
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 33:6a:7f:b3:f3:58:fa:fb:8c:5d:37:0d:84:bd:a3:4a:89:a5:4d:01
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e4:9f:fb:5c:49:7d:86:96:20:c3:d6:9e:38:1d:59:2b:ae:af:d7:2c
Fingerprint (sha256): c3:52:9f:74:34:10:3c:fe:cb:4c:b5:74:2c:66:07:e7:67:e1:72:ea:85:b3:08:19:2a:d4:a8:7b:d7:c2:75:63

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate smtp.cus.org

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for smtp.cus.org

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

smtp.cus.org
smtp.cus.societies.cam.ac.uk

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cus.org
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cus.org
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www.hawkingfellowship.cus.org
bar.cus.org
cus.org
smtp.cus.org
hire.cus.org
hire.cus.org
smtp.cus.org
bar.cus.org
cus.org
hire.cus.org
hire.cus.org
hire.cus.org
hire.cus.org
exch1.cus.org
hire.cus.org
hire.cus.org
hire.cus.org
hire.cus.org
bar.cus.org
cus.org
admin.cus.org
cus.org
cus.org
bar.cus.org
bar.cus.org
hire.cus.org
bar.cus.org
bar.cus.org
hire.cus.org
smtp.cus.org
cus.org
hire.cus.org
bar.cus.org
exch1.cus.org
bar.cus.org
hire.cus.org
smtp.cus.org
hire.cus.org
hire.cus.org
hire.cus.org
smtp.cus.org
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cus.org
unifi.cus.org
smtp.cus.org
hire.cus.org
hire.cus.org
exch1.cus.org
www.cus.org
exch1.cus.org
bar.cus.org
hire.cus.org
sharepoint.cus.org
cus.org
unifi.cus.org
bar.cus.org
bar.cus.org
smtp.cus.org
www.cus.org
exch1.cus.org
hire.cus.org
officewebapps.cus.org
hire.cus.org
hire.cus.org
smtp.cus.org
hire.cus.org
hire.cus.org
hire.cus.org
smtp.cus.org
hire.cus.org
hire.cus.org
cus.org
bar.cus.org
confluence.cus.org
smtp.cus.org
hire.cus.org
cus.org
cus.org
cus.org
cus.org
bar.cus.org
hire.cus.org
smtp.cus.org
cus.org
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avayavc.cus.org
hire.cus.org
smtp.cus.org
hire.cus.org
hire.cus.org
mail.cus.org

Certificate

The complete raw certificate details for smtp.cus.org in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFbzCCBFegAwIBAgISA0KlDv8iL9hugIIwqghfSJsxMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAyMjUxMTA3MjFaFw0y
MDA1MjUxMTA3MjFaMBcxFTATBgNVBAMTDHNtdHAuY3VzLm9yZzCCASIwDQYJKoZI
hvcNAQEBBQADggEPADCCAQoCggEBAMIKUhAASNcKGxLDthG7VIsnxzbAPnAB2fAg
JETWZNCB9FZ1uGCqYX1m2TCGNZR8MsWlATxUlCo/w8WvmduUu3jYQDbrwGBNzkT+
9zqZbcDVqeOgCI0rXP0qPnUFr8PfLqVjZAABTnNq27UP1OzqYROjj+OUxueZ8RVx
7XhWkUFJQFJRlUuTPYenV374avhbUjduUPfIgfRGPUeYRa3Woefr9thcQ5aBhLvo
O/UdImNOociQ0jicosktZtDB6Ue59nhRz6p/HrsrlGab+zWZlD4ts0qTkleRlTN2
4Wf5DmihMNiZwS6jMlr1Yo995CJ8vKXEbnplUIAzM3zxc2qZsQkCAwEAAaOCAoAw
ggJ8MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUH
AwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUM2p/s/NY+vuMXTcNhL2jSomlTQEw
HwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEEYzBh
MC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQub3Jn
MC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQub3Jn
LzA1BgNVHREELjAsggxzbXRwLmN1cy5vcmeCHHNtdHAuY3VzLnNvY2lldGllcy5j
YW0uYWMudWswTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAm
BggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEE
AdZ5AgQCBIH2BIHzAPEAdwBvU3asMfAxGdiZAKRRFf93FRwR2QLBACkGjbIImjfZ
EwAAAXB8PpgoAAAEAwBIMEYCIQDa5yP0Ay9YjLXFMMKfpfTZqE+yg546gfaozbUJ
W5n1lQIhAMdkRLyAnKG0cPP2vlphsNVGH7MQ4ot4iWWuHxt1kl7sAHYAB7dcG+V9
aP/xsMYdIxXHuuZXfFeUt2ruvGE6GmnTohwAAAFwfD6YKgAABAMARzBFAiBvhYT9
uO87ZR6IMWjvG1xyRscRg3/SM9WUkpPZW0xMNQIhAJBE9DhZzgNCLpmG3VJr3oyN
sWs5QejWqefK9a6zf+7vMA0GCSqGSIb3DQEBCwUAA4IBAQATQD72g3z0udGItA6f
ik/larE/g6hvuubZ3jj9IbzPaYh++8k4U5tdQ26DnFJlhA1SgX2YSrrdbM5qHLov
vopyNoAxS3uKi7+VIwqMOMFRKYpDt+D3ZJzBPmaCMO1CvURwannHhug/kZ7osxal
IxCqbV5gfqpf1UQKsHLL09IQm1FhHHAvEN9Rr+41Njs8SJOztjmCULc53VwXqfT8
gUW+1rEa8j1riyWiheoKrJyf8fHQEgQ23kdzaNdiapM36Le6QbKVfVpv0vIgK1yl
vDbDdbw96v9v5oHgY3ppo4d78Mukz6f9dh3DsO01yPU31zvKZsotwvItXMmZwPaW
H4cf
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwgpSEABI1wobEsO2EbtU
iyfHNsA+cAHZ8CAkRNZk0IH0VnW4YKphfWbZMIY1lHwyxaUBPFSUKj/Dxa+Z25S7
eNhANuvAYE3ORP73OpltwNWp46AIjStc/So+dQWvw98upWNkAAFOc2rbtQ/U7Oph
E6OP45TG55nxFXHteFaRQUlAUlGVS5M9h6dXfvhq+FtSN25Q98iB9EY9R5hFrdah
5+v22FxDloGEu+g79R0iY06hyJDSOJyiyS1m0MHpR7n2eFHPqn8euyuUZpv7NZmU
Pi2zSpOSV5GVM3bhZ/kOaKEw2JnBLqMyWvVij33kIny8pcRuemVQgDMzfPFzapmx
CQIDAQAB
-----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 284014894498246223037000813294923471690545
 . . . . . . . . [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 X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-25 11:07:21 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-25 11:07:21 +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 'smtp.cus.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 (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 24495320419582402501592831261310305082593488856818713255958606014702749431713752624426566591598432199373629947213029567659976258785663821270748203520536164228123149687561269183125940506719636307751226402988754697124199599933927308627680389018716847602186136858222192982948870146002535251004889913886956103120731704956365341136328118690090738344328606550649191088560222431899762541020554064643022702964807760983690595440199886284965076533319405948479837006065203905419750470795520920700661769488023873146896134827500100396487208211814866470117846120777985973471121413043671251920581465244662123773996605009123522228489
 . . . . . . . . . . . . . . . . . . . . [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)
							336a7fb3f358fafb8c5d370d84bda34a89a54d01
 . . . . . . . . . . . . . . . . [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 (99 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-x3.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-x3.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 (46 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'smtp.cus.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'smtp.cus.societies.cam.ac.uk'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d913000001707c3e98280000040300483046022100dae723f4032f588cb5c530c29fa5f4d9a84fb2839e3a81f6a8cdb5095b99f595022100c76444bc809ca1b470f3f6be5a61b0d5461fb310e28b788965ae1f1b75925eec00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001707c3e982a000004030047304502206f8584fdb8ef3b651e883168ef1b5c7246c711837fd233d5949293d95b4c4c350221009044f43859ce03422e9986dd526bde8c8db16b3941e8d6a9e7caf5aeb37feeef
 . . . . [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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