$ openssl s_client -crlf -ssl3 -connect imap.gmx.net:993 CONNECTED(00000003) depth=2 C = DE, O = Deutsche Telekom AG, OU = T-TeleSec Trust Center, CN = Deutsche Telekom Root CA 2 verify error:num=19:self signed certificate in certificate chain verify return:0 --- Certificate chain 0 s:/C=DE/O=1&1 Mail & Media GmbH/ST=Rhineland-Palatinate/L=Montabaur/emailAddress=server-certs@1und1.de/CN=imap.gmx.net i:/C=DE/O=T-Systems International GmbH/OU=T-Systems Trust Center/ST=NRW/postalCode=57250/L=Netphen/street=Untere Industriestr. 20/CN=TeleSec ServerPass DE-1 1 s:/C=DE/O=T-Systems International GmbH/OU=T-Systems Trust Center/ST=NRW/postalCode=57250/L=Netphen/street=Untere Industriestr. 20/CN=TeleSec ServerPass DE-1 i:/C=DE/O=Deutsche Telekom AG/OU=T-TeleSec Trust Center/CN=Deutsche Telekom Root CA 2 2 s:/C=DE/O=Deutsche Telekom AG/OU=T-TeleSec Trust Center/CN=Deutsche Telekom Root CA 2 i:/C=DE/O=Deutsche Telekom AG/OU=T-TeleSec Trust Center/CN=Deutsche Telekom Root CA 2 --- Server certificate -----BEGIN CERTIFICATE----- MIIHUDCCBjigAwIBAgIIM52e2Oc5J8kwDQYJKoZIhvcNAQEFBQAwgckxCzAJBgNV BAYTAkRFMSUwIwYDVQQKExxULVN5c3RlbXMgSW50ZXJuYXRpb25hbCBHbWJIMR8w HQYDVQQLExZULVN5c3RlbXMgVHJ1c3QgQ2VudGVyMQwwCgYDVQQIEwNOUlcxDjAM BgNVBBETBTU3MjUwMRAwDgYDVQQHEwdOZXRwaGVuMSAwHgYDVQQJExdVbnRlcmUg SW5kdXN0cmllc3RyLiAyMDEgMB4GA1UEAxMXVGVsZVNlYyBTZXJ2ZXJQYXNzIERF LTEwHhcNMTMxMTEyMTAxNzMxWhcNMTYxMTE3MjM1OTU5WjCBnTELMAkGA1UEBhMC REUxHjAcBgNVBAoMFTEmMSBNYWlsICYgTWVkaWEgR21iSDEdMBsGA1UECBMUUmhp bmVsYW5kLVBhbGF0aW5hdGUxEjAQBgNVBAcTCU1vbnRhYmF1cjEkMCIGCSqGSIb3 DQEJARYVc2VydmVyLWNlcnRzQDF1bmQxLmRlMRUwEwYDVQQDEwxpbWFwLmdteC5u ZXQwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDHP3QN1ztX5m8LaC9m t2nrcLBEfxb61FQCieXW4OV/D5HEy7vgQIAeS+pg2/9ClawprQFbLUa46owUcJuq o2SaefsYqjRhIP/tPeyGRJQmfnyCRRoHIYno57/bz2qmHjzvkqEUMvNGVVej7BJv GukNKPXYicodkRodF3EicTPnGitGeXOsAxyPuCPIsBPAMuuuBzKenS7nj+yseSGe kM7/kjtNgbjDyBXi2BvoUS/U+Gm9p1lq0ymT9fhGj/k9/Qz312GHYxfZB1bhL0pk adF25P8fTIy5tKMWqJfgCF+eaOwgkYecxeCcrt2E3D8ThLvmkBRrXsTT51ZzD7sp 7hPpAgMBAAGjggNkMIIDYDAfBgNVHSMEGDAWgBRiTxPONmeEzRn8oE8Zi+8VVAEy HDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwIGCCsGAQUFBwMB MB0GA1UdDgQWBBRfb2gYyD6V+oBN2Ii5WQj0AddemjBZBgNVHSAEUjBQMEQGCSsG AQQBvUcNAjA3MDUGCCsGAQUFBwIBFilodHRwOi8vd3d3LnRlbGVzZWMuZGUvc2Vy dmVycGFzcy9jcHMuaHRtbDAIBgZngQwBAgIwggEhBgNVHR8EggEYMIIBFDBFoEOg QYY/aHR0cDovL2NybC5zZXJ2ZXJwYXNzLnRlbGVzZWMuZGUvcmwvVGVsZVNlY19T ZXJ2ZXJQYXNzX0RFLTEuY3JsMIHKoIHHoIHEhoHBbGRhcDovL2xkYXAuc2VydmVy cGFzcy50ZWxlc2VjLmRlL2NuPVRlbGVTZWMlMjBTZXJ2ZXJQYXNzJTIwREUtMSxv dT1ULVN5c3RlbXMlMjBUcnVzdCUyMENlbnRlcixvPVQtU3lzdGVtcyUyMEludGVy bmF0aW9uYWwlMjBHbWJILGM9ZGU/Y2VydGlmaWNhdGVSZXZvY2F0aW9ubGlzdD9i YXNlP2NlcnRpZmljYXRlUmV2b2NhdGlvbmxpc3Q9KjCCATkGCCsGAQUFBwEBBIIB KzCCAScwMwYIKwYBBQUHMAGGJ2h0dHA6Ly9vY3NwLnNlcnZlcnBhc3MudGVsZXNl Yy5kZS9vY3NwcjBMBggrBgEFBQcwAoZAaHR0cDovL2NybC5zZXJ2ZXJwYXNzLnRl bGVzZWMuZGUvY3J0L1RlbGVTZWNfU2VydmVyUGFzc19ERS0xLmNlcjCBoQYIKwYB BQUHMAKGgZRsZGFwOi8vbGRhcC5zZXJ2ZXJwYXNzLnRlbGVzZWMuZGUvY249VGVs ZVNlYyUyMFNlcnZlclBhc3MlMjBERS0xLG91PVQtU3lzdGVtcyUyMFRydXN0JTIw Q2VudGVyLG89VC1TeXN0ZW1zJTIwSW50ZXJuYXRpb25hbCUyMEdtYkgsYz1kZT9j QUNlcnRpZmljYXRlMAwGA1UdEwEB/wQCMAAwJAYDVR0RBB0wG4IMaW1hcC5nbXgu bmV0ggtpbWFwLmdteC5kZTANBgkqhkiG9w0BAQUFAAOCAQEADl442s2ouynDNEzl BPzhCxjp47TmKzgzrCGh1AH3+UOkw54mYU65UaY9cJ51jgOu+pjNB4KxVfcqyG5O JcowS09ZtZ+khb1OkzXAAbEqNj0oyH/1K550d5Ir5VbXF0ZdVKVTzEFRyjvUt5NJ /b6Q2bbY/sPm8QiK9SPaYkO5/3J1KB0u7PkqqfOhZ9UJE6mIN66T2bpFmAwle3zL 6+L/VwYSgUNs/w2l6xWlYP3pFFaT12TO43Q057I3vP7yCt3QE/VLDpdQOQ3H0oy2 JQGPJLFby9MPYNkmEmwjh4e95TAY4ZkZMe08ix0J1Smy8DwjTz6SXqYC+EC/PQlh E0UHxA== -----END CERTIFICATE----- subject=/C=DE/O=1&1 Mail & Media GmbH/ST=Rhineland-Palatinate/L=Montabaur/emailAddress=server-certs@1und1.de/CN=imap.gmx.net issuer=/C=DE/O=T-Systems International GmbH/OU=T-Systems Trust Center/ST=NRW/postalCode=57250/L=Netphen/street=Untere Industriestr. 20/CN=TeleSec ServerPass DE-1 --- No client certificate CA names sent --- SSL handshake has read 5734 bytes and written 480 bytes --- New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA Server public key is 2048 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE SSL-Session: Protocol : SSLv3 Cipher : DHE-RSA-AES256-SHA Session-ID: A58B6EBE0A1C6318B017A820761209A25309693EB27EAE802ECCC00A176E19D2 Session-ID-ctx: Master-Key: BFFD874B52ACD6CE52D2FC36290FFCD0533B8EE347B18FF993625E4F5D7047F24E13BFEC57B8B7EC49D6FDCC02FFE3E1 Key-Arg : None PSK identity: None PSK identity hint: None SRP username: None Start Time: 1413453185 Timeout : 7200 (sec) Verify return code: 19 (self signed certificate in certificate chain) --- * OK IMAP server ready H migmx121 101319 IMAP-0MAXI6-1XTC7X0w9K-00Bcvu