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SSL check results of smtp.resend-staging.com

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Discover if the mail servers for smtp.resend-staging.com can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

JSON Refresh

Report created Wed, 30 Apr 2025 14:40:24 +0000

The mailservers of smtp.resend-staging.com can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @smtp.resend-staging.com addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
smtp.resend-staging.com
13.216.65.108
 -
supported
*.resend-staging.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
5 s
smtp.resend-staging.com
98.85.13.188
 -
supported
*.resend-staging.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
5 s

Outgoing Mails

We have not received any emails from a @smtp.resend-staging.com address so far. Test mail delivery

Certificates

First seen at:

CN=*.resend-staging.com

Certificate chain
  • *.resend-staging.com
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • E6
        • remaining
        • 384 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • *.resend-staging.com
Alternative Names
  • *.apps.resend-staging.com
  • *.resend-staging.com
  • resend-staging.com
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E6
validity period
Not valid before
2025-04-30
Not valid after
2025-07-29
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
EF:43:F7:C6:AF:75:8F:EA:5C:D9:ED:25:D7:0D:3B:17:18:64:D2:80:89:95:EB:22:A3:C9:74:9A:28:6E:90:B7
SHA1
CF:1E:D1:49:CD:4F:7C:81:3C:00:A8:52:99:9E:A5:A1:71:43:82:DC
X509v3 extensions
subjectKeyIdentifier
  • A1:A6:CA:1A:F9:C1:4C:00:8C:7D:90:CE:46:1D:11:DE:38:34:27:5E
authorityKeyIdentifier
  • keyid:93:27:46:98:03:A9:51:68:8E:98:D6:C4:42:48:DB:23:BF:58:94:D2
authorityInfoAccess
  • OCSP - URI:http://e6.o.lencr.org
  • CA Issuers - URI:http://e6.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e6.c.lencr.org/33.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
  • 22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
  • Timestamp : Apr 30 14:14:36.128 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:04:3C:19:F6:3E:F1:BD:B5:B0:3F:43:B8:
  • 49:DF:8D:61:43:0D:1D:46:9D:B3:E1:90:3C:15:21:DB:
  • 4B:57:9A:32:02:21:00:9E:88:19:7D:D5:8F:7C:0E:36:
  • A0:0A:44:48:56:35:D0:15:47:14:DF:57:0C:0A:65:80:
  • D4:B9:3E:05:F4:1F:9F
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4:
  • 67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D
  • Timestamp : Apr 30 14:14:36.777 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:40:63:73:47:97:61:A8:D2:99:A8:81:5B:
  • D0:F2:41:1B:0E:00:BA:C2:99:40:9E:36:06:93:BB:E0:
  • 00:A5:CC:B2:02:20:50:47:7E:73:0B:1C:29:9C:32:D2:
  • B7:86:00:57:3E:96:89:62:5D:66:A2:15:6D:8D:FE:31:
  • D1:CD:3B:24:CF:CE