mail-tester.com

Issued by Let's Encrypt Authority X1

About this certificate

This digital certificate with serial number 01:5c:0d:7f:d4:a8:38:5e:fd:8b:b4:cd:d2:bf:09:76:ce:84 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): 01:5c:0d:7f:d4:a8:38:5e:fd:8b:b4:cd:d2:bf:09:76:ce:84
Serial Number (int): 118436207387331436388174359835877318250116
Serial Number lenght: 137 bits, 18 octets

SubjectKeyId: 16:57:e3:d6:91:ab:48:50:b9:80:8c:b9:07:95:fb:db:c5:2e:36:d8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a2:bf:47:93:91:08:7b:92:24:30:6e:6d:d7:4f:5c:ef:7f:9c:e1:f6
Fingerprint (sha256): 82:7f:2b:85:bf:a2:ef:65:4e:76:4e:c1:9c:01:4b:2d:eb:c9:04:a3:21:f6:29:7e:37:2e:a3:8c:96:02:cd:a2

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 118436207387331436388174359835877318250116
 . . . . . . . . [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 2015-12-22 13:36:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-03-21 13:36:00 +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 744924220482904962574535033331347176634398220904791045431829174316589365033350597409691813782024027649718329142280898557692900573014875590805789622756161228467407018622288129141366434242435284759166405410801622678721398038233878662465954884940394737206892965068039007539912215748932622789520092386911371720304300500882749865883252452307796927492384237610035898187833823207230884991075376801819833624669836831449259169460032271677698230314657134403486789474453310863693306914807481014632320836467627622691753220882620287211242507254759600022837362145851818027563612151582491469323935465288960603408149033759679825014836784948637371516386535267863281327338403220126270900755792464303966299334276642851004848655405787110967727664314871730427394534913199815333890689506159736176735384131117761310461742913349384475092510723890595028638682939216400639495073376503168573044887592865801710105333100617497638573372627401781986169759911335390184261955760500157306680064949905907945556067097811620531402585526195126201825800486984669624161426584209725262140867533476405151974150745241396632430279634792948849273234520595843617737148090873723598054087035197010483907270627260933818597003697568515199510126102420478692961427423131807628663912857
 . . . . . . . . . . . . . . . . . . . . [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)
							1657e3d691ab4850b9808cb90795fbdbc52e36d8
 . . . . . . . . . . . . . . . . [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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