The Pobox SMTP servers use a wildcard SSL certificate for *.pobox.com, issued by DigiCert; for your security, the details of this certificate are provided below.
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
0a:b9:40:f4:d5:73:e6:e6:d1:29:12:41:dd:24:18:38
Signature Algorithm: sha256WithRSAEncryption
Issuer: C=US, O=DigiCert Inc, CN=DigiCert SHA2 Secure Server CA
Validity
Not Before: Aug 30 00:00:00 2018 GMT
Not After : Sep 2 12:00:00 2020 GMT
Subject: C=AU, ST=Victoria, L=Melbourne, O=FastMail Pty Ltd, CN=*.pobox.com
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
Public-Key: (2048 bit)
Modulus:
00:e1:90:d4:40:7c:69:dc:6f:9c:ab:71:e2:3d:bc:
e6:d9:97:f3:bd:19:be:28:a6:0a:16:90:dd:a0:c0:
58:aa:a1:82:46:73:81:57:cc:f4:76:ff:96:27:d7:
e6:03:e8:1e:dd:c7:ee:0a:d3:2d:59:53:4b:2a:92:
af:55:6b:5b:74:8c:85:47:5c:4e:f5:6c:39:97:86:
45:80:cf:1a:4a:52:02:fa:f8:9d:cb:45:bb:21:2e:
1a:bf:de:74:c2:6c:08:c5:5b:e8:8a:3d:cf:d1:33:
92:11:79:67:a4:7a:fd:d5:c1:2b:c4:3d:68:31:b8:
66:95:14:bf:68:b1:f2:45:a8:a8:11:42:f9:d3:6f:
9e:0c:47:6f:df:80:97:1a:92:0f:72:b4:3f:a0:b9:
a8:41:c5:b5:db:2d:cc:d2:a2:a3:a0:bd:d2:37:fb:
f2:e3:46:4f:06:1c:ce:a1:25:c5:56:5d:af:39:16:
e3:ee:dc:65:28:2f:07:de:2c:3a:ff:9e:42:40:e8:
a0:62:e6:26:37:67:17:36:52:c2:8e:82:16:a9:53:
88:30:d1:7c:dd:af:e2:26:f5:95:66:5f:7c:5c:d5:
5a:50:19:7c:96:fe:fa:40:ec:56:ac:40:a6:21:dd:
ba:ba:c0:48:e8:32:fe:2b:34:8d:b4:77:77:f9:38:
de:39
Exponent: 65537 (0x10001)
X509v3 extensions:
X509v3 Authority Key Identifier:
keyid:0F:80:61:1C:82:31:61:D5:2F:28:E7:8D:46:38:B4:2C:E1:C6:D9:E2
X509v3 Subject Key Identifier:
5C:69:DB:E7:93:7A:59:71:40:42:1F:CF:D3:5E:87:F0:2A:C7:F3:C4
X509v3 Subject Alternative Name:
DNS:*.pobox.com, DNS:pobox.com
X509v3 Key Usage: critical
Digital Signature, Key Encipherment
X509v3 Extended Key Usage:
TLS Web Server Authentication, TLS Web Client Authentication
X509v3 CRL Distribution Points:
Full Name:
URI:http://crl3.digicert.com/ssca-sha2-g6.crl
Full Name:
URI:http://crl4.digicert.com/ssca-sha2-g6.crl
X509v3 Certificate Policies:
Policy: 2.16.840.1.114412.1.1
CPS: https://www.digicert.com/CPS
Policy: 2.23.140.1.2.2
Authority Information Access:
OCSP - URI:http://ocsp.digicert.com
CA Issuers - URI:http://cacerts.digicert.com/DigiCertSHA2SecureServerCA.crt
X509v3 Basic Constraints: critical
CA:FALSE
CT Precertificate SCTs:
Signed Certificate Timestamp:
Version : v1(0)
Log ID : A4:B9:09:90:B4:18:58:14:87:BB:13:A2:CC:67:70:0A:
3C:35:98:04:F9:1B:DF:B8:E3:77:CD:0E:C8:0D:DC:10
Timestamp : Aug 30 01:27:22.086 2018 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:21:00:99:4B:C7:8C:B7:B9:DC:4D:92:42:59:
4C:BA:83:39:9C:16:F8:7F:41:32:11:FF:81:BF:8E:18:
6C:1B:A6:7E:63:02:20:32:FB:A4:AC:D2:FD:EE:34:38:
CF:BC:CF:51:2E:6A:8A:A8:F0:24:78:35:40:9D:68:9A:
CD:98:A2:2C:A3:A2:41
Signed Certificate Timestamp:
Version : v1(0)
Log ID : 87:75:BF:E7:59:7C:F8:8C:43:99:5F:BD:F3:6E:FF:56:
8D:47:56:36:FF:4A:B5:60:C1:B4:EA:FF:5E:A0:83:0F
Timestamp : Aug 30 01:27:22.073 2018 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:26:5F:18:BA:A0:23:DE:DA:41:4D:EE:C4:
5D:6E:73:9D:57:C7:0A:F3:05:42:0F:FF:50:F7:A1:8D:
AD:91:0D:C3:02:21:00:A7:B5:94:88:89:53:9A:62:FF:
A8:DB:14:AC:9E:58:F5:BD:1C:0E:E4:84:7C:40:FB:57:
9A:F3:A9:C7:A2:C0:B4
Signed Certificate Timestamp:
Version : v1(0)
Log ID : BB:D9:DF:BC:1F:8A:71:B5:93:94:23:97:AA:92:7B:47:
38:57:95:0A:AB:52:E8:1A:90:96:64:36:8E:1E:D1:85
Timestamp : Aug 30 01:27:21.898 2018 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:34:50:12:37:1B:28:FB:30:C5:8D:8B:3E:
D0:49:D0:18:E9:B9:A5:07:8B:4F:E1:83:31:4C:B6:6E:
1A:54:DE:AB:02:21:00:E5:AC:5D:90:20:29:B0:57:F1:
8D:CF:AB:F3:FB:14:9B:49:4D:F0:3A:AE:C6:4E:D9:46:
DC:61:59:04:C3:2D:12
Signature Algorithm: sha256WithRSAEncryption
2a:3f:7b:22:6b:3a:53:0a:c9:20:8d:e5:34:01:b3:a9:76:2c:
0c:d2:f0:9a:9d:ef:37:5a:d7:d7:8e:b2:bc:c6:79:70:b6:22:
e3:5d:74:c3:6d:c7:db:f6:29:5a:e8:b5:1d:92:00:39:4d:f9:
f5:02:c8:96:02:f7:f7:48:47:3d:92:a8:d0:85:7c:e3:48:f0:
21:53:38:a8:dd:a1:72:02:44:e2:b1:d3:bc:27:ad:3b:0b:ec:
b6:7b:06:91:93:9f:ef:15:a3:61:6d:ba:a1:c6:a5:b2:20:ae:
26:69:6c:30:85:c2:f0:b2:a1:b9:84:df:8d:e2:4d:96:93:34:
b3:96:a7:7e:28:26:06:12:56:f4:bb:d3:5c:53:5f:e6:05:00:
d8:cc:0d:05:db:c5:e1:37:73:aa:60:4c:28:2a:d7:b8:ee:b9:
5a:d0:42:87:ba:82:16:be:a6:fd:26:6b:2e:56:9c:d0:1e:bc:
84:35:e2:51:02:10:c7:39:c1:45:a4:ba:67:13:d7:9c:58:aa:
dc:6b:b0:74:2a:94:8b:9a:eb:72:92:37:f7:bd:6b:9b:fd:19:
ec:24:e1:08:85:d7:02:cb:98:19:56:3a:d5:d7:2d:71:f6:04:
cc:d5:55:ea:c1:77:f3:9a:f2:d9:1e:b9:3e:96:3a:90:c9:48:
05:c1:a8:63
Please note that SSL encryption is used only for the transmission of your message to us. If the destination server does not support encryption, your message will not be encrypted after it leaves our system.