commandline session $ openssl s_client -connect pop.mail.yahoo.co.in:995 CONNECTED(00000003) depth=1 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert High Assurance CA-3 verify error:num=20:unable to get local issuer certificate verify return:0 — Certificate chain 0 s:/C=US/ST=CA/L=Sunnyvale/O=Yahoo! Inc./CN=legacy.pop.mail.yahoo.com i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance CA-3 1 s:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance CA-3 i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance …