mail-tester.com

Issued by Let's Encrypt Authority X1

About this certificate

This digital certificate with serial number 01:62:48:de:89:74:f6:24:61:27:66:1a:d0:f1:b5:f7:30:fd 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): 01:62:48:de:89:74:f6:24:61:27:66:1a:d0:f1:b5:f7:30:fd
Serial Number (int): 120556817783568084585092616444460408451325
Serial Number lenght: 137 bits, 18 octets

SubjectKeyId: 29:d5:b5:47:c7:67:c8:3a:d8:63:cb:95:1b:fd:e5:ad:ef:87:8c:53
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 3c:7d:e6:9c:98:ae:2d:0a:34:0f:5d:25:ea:b2:45:d8:2e:4f:70:0a
Fingerprint (sha256): 62:06:eb:6f:fe:32:9a:3e:d1:11:f7:62:f1:fc:7c:6e:91:e3:2c:6c:67:ee:85:d1:7e:82:53:18:13:c5:11:dc

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

Other certificates including the domain name mail-tester.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for mail-tester.com 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 120556817783568084585092616444460408451325
 . . . . . . . . [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 2016-01-29 10:11:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-04-28 10:11:00 +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 945598853345732637777607623825501859116862776214671767978016266020752499953892979280246232806463393725254009255714811424964138825053358954643883797853009913038925070465828760139278028478461783426259487922009211842722999578356421878269217186483841162897219449374890662838716841273355003897538082939702735303262934661026580021878018393649941378311216111333286662596958500422099139023772040754455682340729318174490871388573588133806599415404122893612218059996188098739933336890311510678477857665086220120812852691353954471425384079951834594059157881884867447895977320447703705620581853767812797408553496367531381095630175185433160789153526434637330629923953712666590988611306202465313447437300698933495006125263731240270168418841236499370789737134968921100184332734253816603741722229238069053124321973582011684139053591357051988681301638347031009938344492262806790563142448825374584595040219553954893825681396986119215135772746946597049916869008241121703991384701169528136748477219059195638254756107623377125927630185282069913990351235365578463422375669490545820639452197866184138422086793106541720526805160109893832598908988353774182558988002580519805198272552208917685660480648666375922689427899922286167044612986983170844151261503899
 . . . . . . . . . . . . . . . . . . . . [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)
							29d5b547c767c83ad863cb951bfde5adef878c53
 . . . . . . . . . . . . . . . . [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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