mail.io

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:cf:7e:61:09:17:a7:d8:8a:12:7c:ef:f4:77:d1:3a:84:78 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=mail.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:cf:7e:61:09:17:a7:d8:8a:12:7c:ef:f4:77:d1:3a:84:78
Serial Number (int): 419055580244355305749017922575114870359160
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 46:07:65:b6:6c:64:ad:44:d1:02:5f:da:53:e4:15:0c:ae:d0:9f:87
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e4:9a:28:ab:86:08:a5:60:3d:6d:95:2e:a1:6b:d0:11:7a:d3:75:c6
Fingerprint (sha256): 15:00:8c:b1:51:1b:4e:c4:29:f2:4a:32:13:e0:10:b4:34:18:41:d2:f2:15:2d:62:32:6a:20:77:88:24:6e:34

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 mail.io

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mail.io

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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

mail.io

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mail.io

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzb2WYSzDLPybjYVNhBhx
wY7SKc40hDLOjvV5Dhk88CMXen6vscgc5WuIcja/06Ltl3MArtLd+RSGGcM1bXjv
OXQFWwrEMqmQqorRhRSGWnq2Kco4IdTrnzqoIz0sojguhs0wrmkkLTE50pGM9ovI
uOv5C63WmR0H4cIAGnSRb45DG1kD9xuqVmILYAClQl8rJozAbpyqTRx/uongMGrK
MJht4aKxkzb17nnl3BownPnJeYfw67npzeBVs2wH1NTrkL2C0h0F7Qm19RpQNw5H
Wm3vkUnJIaTM3+BcelOtZ/4vbsfUxBQ9HB8QlJxo82eN1tlWvmfXv3w3i0LEpLBF
vQIDAQAB
-----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 419055580244355305749017922575114870359160
 . . . . . . . . [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 2019-08-30 16:44:17 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-28 16:44:17 +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.io'
 . . . . . . . . [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 25972341559361730848501973485181940640927845648174051371459051672115558800873608365889647075178195099932225640975974877893002955525887847079051379516896062784132425610506141050441586270761539799783859774513801264837647799618718564727346218720558573872726553638523463817645817944376760992890446303107091076675005373319401215378751976475245015900183379570308270729014933630972656354193612445474068021258967653503861428589589391115663618636156851474574167226248528085909921340566153823324246048630615342146509114096250977713863700601675253490216558548774308440939066988047177094772723870234837483400967635123235439265213
 . . . . . . . . . . . . . . . . . . . . [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)
							460765b66c64ad44d1025fda53e4150caed09f87
 . . . . . . . . . . . . . . . . [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 (99 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 (11 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.io'
 . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ce3a0bb13000004030047304502206dca2ac2a8701fd30b0cf5973f60116cd91a664d99018236435605f7b9ed71ae022100eabf4276ca03ba84a6a341601191d9eaffe8ad5cde503e9b0388c3d5afd7b1bf007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016ce3a0bade000004030047304502201edb0e8c97134b5151cf35ca43739a4aecaa57443ba7272043370265c4f82a42022100b81ff06959339788352b2c6eb6faa752effdcc10aba62581072e473323f8b8ca
 . . . . [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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