mail-tester.com

Issued by Let's Encrypt Authority X1

About this certificate

This digital certificate with serial number 01:bf:6a:2f:23:a8:a9:12:ab:d1:22:9b:c5:89:45:ba:e2:66 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:bf:6a:2f:23:a8:a9:12:ab:d1:22:9b:c5:89:45:ba:e2:66
Serial Number (int): 152247360942412038356466759823653070365286
Serial Number lenght: 137 bits, 18 octets

SubjectKeyId: 6d:d7:05:81:07:60:16:44:c7:58:81:7c:f5:1d:9e:54:3f:1f:5e:32
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 4c:37:6e:28:9f:8c:47:46:ac:04:f6:0a:2e:c9:dc:5b:46:24:13:87
Fingerprint (sha256): 7e:ab:73:87:4e:9b:79:3d:5c:08:9b:be:8a:57:43:17:c9:57:54:3b:da:0b:c9:fb:c1:da:4c:c6:b2:ee:43:d3

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 152247360942412038356466759823653070365286
 . . . . . . . . [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 09:57:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-04-28 09:57:00 +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 801275764688843683231198500443522378703564001086812115074796212086617019066832902638178338546615215912588891158498068540873651776235720307480430449890391107657581680060664216409935596883179806229862417490986831820464009708392891570697028943213404245515216016655535305916934360424221601548354781908804691133821693474106230831753425283127753324264290909132909987647604625700671989147970347771524050852130815020155398007300650975149332946271412954526981913633095509511010068705061827026049510505496572160747412265161313279555037149368502832128745384676271352864326293078999563119396393180395501512308724322897471299108266232494326045488655297346337722772658169837860627669447674492397641287661708294364915388094696590606517967020145505055613692694257513527475539628470443520527447722194477081328868824532229694024399646712689945320859950681826098466137682005471729667835652407751870454111056464813953504718374931091033312927103766312278026616531095007464506572155390466142719161085718877026663939710048670361933213830320200408588373828155116555633772266679191433881154670936899345201775544163261047865305543573590629716584049308921941413313053822595512021045080089849043956323171239749337472514078124493045913082822530460736425887067511
 . . . . . . . . . . . . . . . . . . . . [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)
							6dd7058107601644c758817cf51d9e543f1f5e32
 . . . . . . . . . . . . . . . . [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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