smtp.1a1.it

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:f4:d0:e8:95:33:9f:08:3d:ca:0c:29:a0:5e:09:b9:d6:a3 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=smtp.1a1.it

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:f4:d0:e8:95:33:9f:08:3d:ca:0c:29:a0:5e:09:b9:d6:a3
Serial Number (int): 431755728317913299565218812501406542059171
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: d2:6c:fd:c9:04:33:09:37:7d:86:03:c6:53:71:4d:db:ee:73:6c:ca
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c7:74:b0:b8:2a:9c:a6:a6:9e:89:df:92:66:ed:98:98:a4:11:9e:ab
Fingerprint (sha256): ed:11:0c:fd:14:5a:22:ba:09:e6:a8:13:64:3e:41:09:09:8c:c5:6b:24:56:e3:43:8b:e6:29:6d:71:29:17:e9

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 smtp.1a1.it

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for smtp.1a1.it

Public Key Algorithm

RSA

Key Size

3072

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

smtp.1a1.it

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1a1.it

Certificate

The complete raw certificate details for smtp.1a1.it 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 431755728317913299565218812501406542059171
 . . . . . . . . [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 2019-11-12 14:51:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-10 14:51:47 +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 'smtp.1a1.it'
 . . . . . . . . [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 (3184 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 4364717294722492677040992381897560799662332037457613443520911246437129874115545444918960044164298727287025413750742740119397059867971969069492318885896196451051670042212826582462449594536794379744429049501613384708040047969928905977936885670480906347778062252772682189941785375918584140087651792931746554672472145871397305054399491799359143886053279172868292453018825172836946388197124376393533522038462041957080207497063925499246116717659269978538818621523539083859067319402134663721468663309589747771439439721501058829849605184478796641059176676302743435772726848389108327875045698770186121632064478979321433940033541965063516405953640709923107209883353017424919911353898902638981107007143389034014102404517916767444796029347521995265886494075928334566945037535968745213880899955751798927283836443014464030755666231412729793879473138791153270135263067275059448018387224370634868859276477913736185706056826520045255619062351
 . . . . . . . . . . . . . . . . . . . . [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)
							d26cfdc9043309377d8603c653714ddbee736cca
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'smtp.1a1.it'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f100770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016e605053fd00000403004830460221008aad29dd97906021bca04f369672626ade76ac135af2d5b42d9ff88a37ebd95f022100afc99ae13fdf560de03c1338f2b2c98243e80acb0062dc39878f6d630c784f150076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016e605055720000040300473045022040d3c5ad5455ad2e3a2017443787e98c96f1283c6684e0feb25472f9f42df610022100a5eb167d049827ad75af8f0b8177ccbfae0ceb738b2f8c30dd69888316726386
 . . . . [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)
		009bd41e705d4991b76d305ebbd9b636cbe3747e341a91e197b412d5b8609bf298be4442bb80be8dfb02d78d5576b12347757735f9d0caeb519bd8bd65c08adc84f757b2d693e785210122b3f15061882656d179e9765b5319f3649d76357a7d44f99cdea22d79ecbc5aa0feefb6e36fa7e57d95d6c62e66f3c32fd69ebb801b2a1a8fa7b139362599b28de4d5dc25e51a8effa32eff7a681e7d6e3d18404babd28af2d8b8ab023e6c8ab116d687e3708ac2cd3ed6f0a17891c55a96fca47f2f83897386fe8647726069602e4454aa21ba3d0fdba3e07dd6386a8c781ca6d488e4f34caa6d10e2e89d3c1d81c5e120908b35781397f2559d0f31b296bf21079f0a