smtp.1a1.it

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:af:8c:bb:61:1a:2d:a9:3f:03:8a:4c:56:16:b6:20:8e:cc 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): 03:af:8c:bb:61:1a:2d:a9:3f:03:8a:4c:56:16:b6:20:8e:cc
Serial Number (int): 321073336854835200491998096387888679784140
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a6:d8:21:00:19:28:b4:3c:bd:6a:9a:b5:2f:8f:65:6c:5f:1b:b1:72
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 1a:34:58:7d:26:1b:f2:61:3e:28:c4:b3:0e:b6:76:bd:0b:f0:c2:c9
Fingerprint (sha256): 51:06:3e:d0:68:02:1a:df:6c:ab:00:92:33:aa:55:f6:da:13:1c:eb:f8:92:85:3b:91:ad:a7:de:ca:01:df:d8

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 321073336854835200491998096387888679784140
 . . . . . . . . [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 2020-01-31 13:01:35 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-30 13:01:35 +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 5000717458641807886043814639664755132030992629996313161613939338844879499192497954109287747568570108197988386406336844181443233899661959981378892813042812341513112929599712544654067589723439491240099616930520334214713338348024790583536418488576126611834749951133170198685937881957558350946060616059603388144176196513256688398068281277072562831258864629101609548976454016205816610230921140641910958616310955310158087464046758880674287932069911836205616642376079873948292479930550306198003207036436213533020333975317038941016828278460653251137823598732722881077649520395055330692965739168449477113700441649697364537205315988507940920315113079214132390731348775731414914121796042015451831316562800191153368333758295111613133213958810410188283605599962518930357866452567042737779307257442146203891873039478663046150756606906919392149538205253867287558199387809391359078835555720070984512173178356370068088244976907432769730444189
 . . . . . . . . . . . . . . . . . . . . [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)
							a6d821001928b43cbd6a9ab52f8f656c5f1bb172
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016ffbe82fe00000040300473045022100ef692869fed1ab26b1bded88214653d116fcdf0fb42e58ade920ea15455c30c4022078cbe6ddf4a7f3456de6544a8bbdb430649c5aef3166811af32614c07f5a206500750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016ffbe83079000004030046304402200081bcfe7f2da9a7dbf5d32c98d5056a8124d8de8db7ad57e023bec0bcb60b81022079839e547b05bf652b462fa8ea80994f2c1187c5d42a98663d305c69b66ddfa9
 . . . . [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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