-int SMTP_helo(FILE *sockfp,char *host);
-int SMTP_ehlo(FILE *sockfp,char *host,int *opt);
-int SMTP_from(FILE *sockfp,char *from,char *opts);
-int SMTP_rcpt(FILE *sockfp,char *to);
-int SMTP_data(FILE *sockfp);
-int SMTP_eom(FILE *sockfp);
-int SMTP_rset(FILE *sockfp);
-int SMTP_quit(FILE *sockfp);
-int SMTP_ok(FILE *sockfp);
+int SMTP_helo(int socket, char smtp_mode, const char *host);
+int SMTP_ehlo(int socket, char smtp_mode, const char *host, char *name, char *passwd, int *opt);
+int SMTP_from(int socket, char smtp_mode, const char *from,const char *opts);
+int SMTP_rcpt(int socket, char smtp_mode, const char *to);
+int SMTP_data(int socket, char smtp_mode);
+int SMTP_eom(int socket, char smtp_mode);
+int SMTP_rset(int socket, char smtp_mode);
+int SMTP_quit(int socket, char smtp_mode);
+int SMTP_ok(int socket, char smtp_mode, int mintimeout);