Solution : https://service.sap.com/sap/support/notes/741427 (SAP Service marketplace login required)
Key words : 
2004-05-23a quick workaround, kernel patch level, kernel patch level 1540640, kernel patch level 22700, kernel patch, short dump, smtp reason, system runs, smtp-server, internalconversion function
Related Notes : 
       
| 447519 | Kernel patches for code pages, languages and locales |