smtp.cus.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:3b:e0:f6:01:e6:77:8e:16:e2:8d:f6:25:64:7e:57:e3:e7 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): 04:3b:e0:f6:01:e6:77:8e:16:e2:8d:f6:25:64:7e:57:e3:e7
Serial Number (int): 368824827790001264127600620731695894094823
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 9d:61:5d:67:99:ab:1e:5b:83:eb:5c:a9:f5:65:fc:27:45:7a:02:02
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 31:73:6e:15:03:66:7b:82:f2:7b:ec:8d:06:4f:e7:e1:21:93:84:68
Fingerprint (sha256): 71:7b:d7:aa:be:cd:06:73:ed:41:9d:fd:80:c4:9c:0a:67:21:4c:07:c7:bc:dc:3d:6f:af:16:0e:ef:b6:05:60

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

Other certificates including the domain name cus.org

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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
hire.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-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy4+hrfp39o20ALo1sVYO
vBEmMx2EB06I4Cm8ioOniPs1MvQs+i+lACbX42oL6ovcfcJ1ZsXAS3owZJtAmxZS
egAphc0UlzgqmgmhUZZzLdUksFcIETKZp9ccowMIwwXsZ7iYokG3hxu+Jzze3mEs
v0J75XIqCuC11KZIdzeDl1qcWGKuHuQae+dNXaQXuNgLcV4DR9o1DSswUKPX9/to
tBsW8NYUOEvagkjSEU0E8WCcfybex7o2zF0AOlKvhDJouJXl44x+zGUxHKMbwGsd
T8Q6/vQLGBWuBpg0wXzKCL6rZJfknmVnHv93/cYkDFjq5l5m+nRbR9bb9ecNh1A0
1wIDAQAB
-----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 368824827790001264127600620731695894094823
 . . . . . . . . [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 2019-12-27 11:08:14 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-26 11:08:14 +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 25697203270586098183716737647675474772719229064695018244913007041897977942539986703813484761778331434113424391048353510384420999692669675568944478987756799932370558256738208546780610661253214656528672620434895497031996654235004203306528304327305197494249176889726864479003623212883951056103154587319847787685014425179782171554300526988206554134165523551882948207876130994091168810945486230756548531585531941984322154073128964676464325902756158738466072365543651346456842096070415272852076580050517851981664765176242111338972836136595178880157064106775044959826602485395122402978581987888406381530147801037724367992023
 . . . . . . . . . . . . . . . . . . . . [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)
							9d615d6799ab1e5b83eb5ca9f565fc27457a0202
 . . . . . . . . . . . . . . . . [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)
							00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f4741d5a70000040300483046022100b2d9ee9545039fc89d8abb08f5c3a5f5cf9f025c37e7c7ea13ba033fa5c41c16022100e5af517dd55d2b6b2701200da323a26fdc7536c8fd0cca724d53df31487ba000007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f4741d5d8000004030047304502204a7eb2afa9f34d98734617d685d4be327793cdec3a05b889efef24a0cedefe71022100c5078aa3239a1c798d838f0319e1da968fac2ecf89368addc00bea8ef828e78f
 . . . . [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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