Solution : https://service.sap.com/sap/support/notes/1747180 (SAP Service marketplace login required)
Key words :
authusers=<smtp user authentication>] configuration tls, internet standard rfc 4422 describes, parameter icm/server_port_<xx>, incoming e-mails authusers, user/password query external, icm/server_port_1 = prot=smtp, smtp-specific configuration options, vclient=<ssl client verification>, incoming e-mails plain, tls=<smtp tls usage>
Related Notes :
1728283 | SAP Kernel 721: General Information |
1724704 | |
1702785 |