linux:centos:email:check-connectivity
Table of Contents
Check SMTP server connectivity
Check SMTP SSL/TLS
openssl s_client -connect medjava.ro:465
CONNECTED(0000013C) --- Certificate chain 0 s:OU = Domain Control Validated, OU = Globe Standard SSL, CN = medjava.ro i:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Domain Validation Secure Server CA 1 s:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Domain Validation Secure Server CA i:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Certification Authority 2 s:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Certification Authority i:C = SE, O = AddTrust AB, OU = AddTrust External TTP Network, CN = AddTrust External CA Root --- Server certificate -----BEGIN CERTIFICATE----- MIIGUTCCBTmgAwIBAgIQcWa4ozN875XturRmQfOj3DANBgkqhkiG9w0BAQsFADCB kDELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4G A1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxNjA0BgNV
Check SMTP STARTTLS
openssl s_client -connect medjava.ro:587 -starttls smtp
CONNECTED(00000134) --- Certificate chain 0 s:OU = Domain Control Validated, OU = Globe Standard SSL, CN = medjava.ro i:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Domain Validation Secure Server CA 1 s:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Domain Validation Secure Server CA i:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Certification Authority 2 s:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Certification Authority i:C = SE, O = AddTrust AB, OU = AddTrust External TTP Network, CN = AddTrust External CA Root --- Server certificate -----BEGIN CERTIFICATE----- MIIGUTCCBTmgAwIBAgIQcWa4ozN875XturRmQfOj3DANBgkqhkiG9w0BAQsFADCB kDELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4G A1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxNjA0BgNV BAMTLUNPTU9ETyBSU0EgRG9tYWluIFZhbGlkYXRpb24gU2VjdXJlIFNlcnZlciBD ...
linux/centos/email/check-connectivity.txt · Last modified: 2023/07/04 19:36 by 127.0.0.1