mailserver.itool4.net

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:38:fe:d2:e4:dd:38:8e:3e:9c:95:1b:1f:53:1d:a7:64:5e was issued on by Let's Encrypt.

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=mailserver.itool4.net

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:38:fe:d2:e4:dd:38:8e:3e:9c:95:1b:1f:53:1d:a7:64:5e
Serial Number (int): 280731389278039271511265049019849808241758
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 46:f6:65:15:b3:b8:58:00:7a:85:24:dd:6b:c8:97:9e:64:3d:ee:7b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): d7:2e:c4:3f:e8:76:77:49:ef:61:69:37:6e:f1:f7:e5:ab:74:af:44
Fingerprint (sha256): 15:10:bd:cc:1e:1c:82:ce:af:51:f3:a5:e6:75:9b:72:a8:b0:bc:e0:07:d1:2a:3f:03:06:87:88:93:21:e9:72

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 mailserver.itool4.net

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mailserver.itool4.net

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

8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

mailserver.itool4.net

Other certificates including the domain name itool4.net

(limited to 100 certificates)
www.adventgemeinde-sonneberg.de
team-f.de
habgmbh.de
friedrich-sailer.de
cycro-system.com
baumuster.ch
baumuster.ch
www.sentech.com
ksg.de
gotano.de
caravan-elements.de
energieverbraucher.de
regioconsult.de
btt-steuerberatung.de
kroatien2.b01.itool4.net
caravan-elements.de
www.radreisen-online.de
www.stgeorgklinikum.de
api.cycro-digital-solutions.de
feldbinder.com
kroatien2.b01.itool4.net
aunity.de
aunity.b01.itool4.net
pfefferkorn-maschinenbau.de
cms.material4print.de
wandern-in-thueringen.info
energieanbieterinformation.de
ernestinum-gotha.de
schwedenzeiten.de
cloudwartung.de
drlange.api.itool4.net
caravan-elements.de
www.mymovieapp.de
becker-rf.com
feldbinder.com
cms.kroatientravel.com
besserhoeren.cycrosystems.basehosts.de
www.energieanbieterinformation.de
energieverbraucher.de
halang.api.itool4.net
friedrich-sailer.de
ssstev.de
aunity.b01.itool4.net
feldbinder.com
feldbinder.com
einfacher-hoeren.de
aunity.b01.itool4.net
newsletter.itool4.net
pfefferkorn-maschinenbau.de
www.sentech.com
cycro-system.com
baumuster.ch
baubeschlag-habeg.de
cda.de
www.sentech.com
becker-rf.com
ngk-mitglieder.de
szeit.api.itool4.net
www.getec-ac.de
radreisen-online.de
energieanbieterinformation.de
ngk-mitglieder.de
croatiatours.info
cycro-system.com
webmail.itool4.net
ssstev.de
api.spezialtechnik.de
www.getec-ac.de
aisci-erfurt.de
www.sentech.com
piwik.itool4.net
feldbinder.com
mailserver.itool4.net
wt-muehlheim.de
api.lemuth.com
kulturstiftung-thueringen.de
egstedt.de
aunity.b01.itool4.net
zahnarztpraxis-herrnberger-ilg.de
friedrich-sailer.de
www.stgeorgklinikum.de
cms.material4print.de
einfacher-hoeren.de
ngk-mitglieder.de
www.team-f.de
feldbinder.com
www.stgeorgklinikum.de
lieselotte-keil.com
kulturstiftung-thueringen.de
cycro-digital-solutions.de
guenstig-radreisen.de
webmail.itool4.net
ngk-mitglieder.de
habgmbh.de
adventgem-sbg.f01.itool4.net
www.sentech.com
zahnarztpraxis-herrnberger-ilg.de
ngk-mitglieder.de
www.stgeorgklinikum.de
api.lemuth.com

Certificate

The complete raw certificate details for mailserver.itool4.net in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyrIGqq6zQjQL/yDSi001
VBGkQbC1QZfcS4pAIN2GbkPt2mkhUKvG1DnIEkek8LjKWX8Fh5lynmaD4/t36O2i
EIStnnl8S/58YabCS7GuSmzW5XTOpwSJShDRC9I8WsAkCT3aZVewvHY8Qp0NV+h1
60xGdWDtZQR4f6/BamrJMhDOSAeq3WUeddhzxfb40iY178w2+ifPi/rqk6tx+p8U
W7ql+QuICJte9cuhSkJzgXhhonqTtRCk8Uo9GqDgAQ75detfHq+fc2BwL+BdL3CH
S/eSMlLQWAPSmxl21ipq9ahjjU68NOO42Elbapuyr7Xsly/P+Y5SWKBIew+0E68y
oQIDAQAB
-----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 280731389278039271511265049019849808241758
 . . . . . . . . [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 2016-11-17 16:50:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-02-15 16:50:00 +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 'mailserver.itool4.net'
 . . . . . . . . [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 25587925516308556615115903888213612559770146639800254109454599566984508977716142164331398695661276129436055956792127148613805367188300823678080680779018075963190767782648958654048046353806929286685277858039013390552936819467072377461036629495040638769359049787944857328506941916377741846029168991787990552586074102570260304973754354058298865306205343336086823634637193732109549819479909183014427996837509250635862630570493049516505121717693868562713798381687500540595915249253490258132789086877895439551597948101346880534523847845755408597338683366952315300881454854701775758463652226741811041683851167752990158172833
 . . . . . . . . . . . . . . . . . . . . [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)
							46f66515b3b858007a8524dd6bc8979e643dee7b
 . . . . . . . . . . . . . . . . [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-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 (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mailserver.itool4.net'
 . . . . . . . . . . . . . . . . [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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