mail.zeekit.co

Issued by R3

About this certificate

This digital certificate with serial number 03:ef:bc:c3:e9:b3:cb:68:60:d1:1a:2e:b1:74:19:a9:88:85 was issued on by Let's Encrypt.

With 3 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.zeekit.co

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ef:bc:c3:e9:b3:cb:68:60:d1:1a:2e:b1:74:19:a9:88:85
Serial Number (int): 342915255590526241566487645544544064866437
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1b:4d:e6:e9:27:d4:2d:9d:3d:1a:d5:70:94:50:21:f2:72:8b:9a:e1
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): d5:35:17:40:6a:c0:14:31:36:24:95:a4:bf:a2:51:b0:d6:72:3e:a9
Fingerprint (sha256): 02:0e:b4:69:37:d8:49:74:1b:cc:8a:2a:f7:fb:9f:44:01:44:7c:e2:1e:dc:62:43:ed:76:8d:72:30:0d:46:f9

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate mail.zeekit.co

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mail.zeekit.co

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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

autoconfig.zeekit.co
autodiscover.zeekit.co
mail.zeekit.co

Other certificates including the domain name zeekit.co

(limited to 100 certificates)

Certificate

The complete raw certificate details for mail.zeekit.co in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----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 342915255590526241566487645544544064866437
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-03-21 12:19:48 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-06-19 12:19:48 +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.zeekit.co'
 . . . . . . . . [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 676884827072607135887913409276981448010924718768524607002393062518540393651026024301579867230242539100349587027148696117444713606226449050151953044293340819109051207680550765142280705103928744936374958900267580145658532829059143892704226623352516680303758335632981212760384436120419109865478059725974001216382519891536633315033469532067290785148021019517829958977654568535731143969392829113750705232215714083135260748794050809496682121211880376576932563268577896253111525868569206411008255672079490053231783624853911617426098857956554704030871485233497985816242899943482570505226212554522547953321737297728774840296945046181826465950268217289688533539834096849584846568837119956557147255821867466984985303647282585734751560940600644313083655175176087425814796307523036349353016997466680723146966011382223623685320413787078189306686558790701228409551435463419217789374676555297660756987174640825180497308455673289189952041422960061834802024382557426727986970668181049632039896167117543187091933051486311418481196949658333075171814093574984887320517539433214216801784242504753337450908111201855104500094965549962804149352969890861189190573329004455220608866310441259856916139893578636958705589010656458694042344697966488212792338879301
 . . . . . . . . . . . . . . . . . . . . [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)
							1b4de6e927d42d9d3d1ad570945021f2728b9ae1
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (64 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autoconfig.zeekit.co'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.zeekit.co'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.zeekit.co'
 . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.11129.2.4.3 (CT Precertificate Poison)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [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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