diff --git a/11.client-server-test-error- read write on closed socket/client b/11.client-server-test-error- read write on closed socket/client
new file mode 100755
index 0000000..423dc80
Binary files /dev/null and b/11.client-server-test-error- read write on closed socket/client differ
diff --git a/11.client-server-test-error- read write on closed socket/daytimecli.c b/11.client-server-test-error- read write on closed socket/daytimecli.c
new file mode 100644
index 0000000..811d59a
--- /dev/null
+++ b/11.client-server-test-error- read write on closed socket/daytimecli.c	
@@ -0,0 +1,94 @@
+
+
+#include	"../basic.h"
+#include    <unistd.h>
+
+void sigpipeaction (int signal){
+    
+	int status, pid;
+    
+    fprintf(stderr, "Sigpipe catturato\n");
+    
+    
+}
+
+
+int main(int argc, char **argv) {
+    
+    
+    struct sigaction sigpipestructure;
+    sigpipestructure.sa_handler = sigpipeaction;
+    sigpipestructure.sa_flags = 0;
+    
+    sigaction (SIGPIPE, &sigpipestructure, NULL);
+    
+    
+    
+    siginterrupt (SIGPIPE,1);
+    
+    
+    
+    
+	int			sockfd;
+	struct sockaddr_in	servaddr;
+
+	if (argc != 3){
+		printf("usage: daytimecli <indirizzoIP> <porta> \n");
+		exit(0);
+}
+        if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
+			printf("socket error\n");
+			exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+        servaddr.sin_port = htons(atoi(argv[2])); /* server port */ 
+
+        if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
+                printf("inet_pton error for %s\n", argv[1]);
+		exit(0);
+}
+	if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
+		printf("connect error\n");
+		exit(0);
+	}
+	
+	struct sockaddr_in	r_server_local_addr;
+	unsigned int r_server_local_addr_len = sizeof(r_server_local_addr);
+	
+	char * socket_buffer = (char *) malloc (r_server_local_addr_len) ;
+	int ridden;
+
+
+
+    
+    
+    for (int i = 0; i < 100; i ++){
+        
+	ridden = read (sockfd, socket_buffer,r_server_local_addr_len );
+	if (ridden < 0){
+		fprintf(stdout,"Errore durante la lettura\n");
+		exit(-1);
+	} else {
+		fprintf(stdout,"Ho letto  %d bytes\n",ridden);
+	}
+    }
+    
+
+    close(sockfd);
+
+	
+	memcpy (&r_server_local_addr,socket_buffer, r_server_local_addr_len);
+	
+	
+	char buff[INET_ADDRSTRLEN];
+	short port;
+	
+	inet_ntop(AF_INET, &(r_server_local_addr.sin_addr), buff, INET_ADDRSTRLEN);// get ip
+	port = ntohs(r_server_local_addr.sin_port);// get  port
+		
+	fprintf (stdout,"%s%c%hu\n",buff,':',port);
+	
+	
+	exit(0);
+}
diff --git a/11.client-server-print-ip-port-bothv2/daytimecli.c~ b/11.client-server-test-error- read write on closed socket/daytimecli.c~
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/daytimecli.c~
rename to 11.client-server-test-error- read write on closed socket/daytimecli.c~
diff --git a/11.client-server-test-error- read write on closed socket/daytimecli.o b/11.client-server-test-error- read write on closed socket/daytimecli.o
new file mode 100644
index 0000000..3753eb4
Binary files /dev/null and b/11.client-server-test-error- read write on closed socket/daytimecli.o differ
diff --git a/11.client-server-print-ip-port-bothv2/daytimesrv.c b/11.client-server-test-error- read write on closed socket/daytimesrv.c
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/daytimesrv.c
rename to 11.client-server-test-error- read write on closed socket/daytimesrv.c
diff --git a/11.client-server-print-ip-port-bothv2/daytimesrv.c~ b/11.client-server-test-error- read write on closed socket/daytimesrv.c~
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/daytimesrv.c~
rename to 11.client-server-test-error- read write on closed socket/daytimesrv.c~
diff --git a/11.client-server-print-ip-port-bothv2/daytimesrv.o b/11.client-server-test-error- read write on closed socket/daytimesrv.o
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/daytimesrv.o
rename to 11.client-server-test-error- read write on closed socket/daytimesrv.o
diff --git a/11.client-server-print-ip-port-bothv2/makefile b/11.client-server-test-error- read write on closed socket/makefile
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/makefile
rename to 11.client-server-test-error- read write on closed socket/makefile
diff --git a/11.client-server-print-ip-port-bothv2/makefile~ b/11.client-server-test-error- read write on closed socket/makefile~
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/makefile~
rename to 11.client-server-test-error- read write on closed socket/makefile~
diff --git a/11.client-server-print-ip-port-bothv2/readme~ b/11.client-server-test-error- read write on closed socket/readme
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/readme~
rename to 11.client-server-test-error- read write on closed socket/readme
diff --git a/11.client-server-test-error- read write on closed socket/readme~ b/11.client-server-test-error- read write on closed socket/readme~
new file mode 100644
index 0000000..e69de29
diff --git a/11.client-server-print-ip-port-bothv2/server b/11.client-server-test-error- read write on closed socket/server
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/server
rename to 11.client-server-test-error- read write on closed socket/server
diff --git a/11.client-server-print-ip-port-bothv2/client b/12.3 nodes communication/client
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/client
rename to 12.3 nodes communication/client
diff --git a/11.client-server-print-ip-port-bothv2/daytimecli.c b/12.3 nodes communication/daytimecli.c
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/daytimecli.c
rename to 12.3 nodes communication/daytimecli.c
diff --git a/12.3 nodes communication/daytimecli.c~ b/12.3 nodes communication/daytimecli.c~
new file mode 100644
index 0000000..239a866
--- /dev/null
+++ b/12.3 nodes communication/daytimecli.c~	
@@ -0,0 +1,31 @@
+/* Client che interroga un daytime server */
+
+#include	"../basic.h"
+
+int main(int argc, char **argv) {
+	int			sockfd, n;
+	char			recvline[MAXLINE + 1];
+	struct sockaddr_in	servaddr;
+
+	if (argc != 3){
+		printf("usage: daytimecli <indirizzoIP> <porta> \n");
+		exit(0);
+}
+        if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
+			printf("socket error\n");
+			exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+        servaddr.sin_port = htons(atoi(argv[2])); /* server port */ 
+
+        if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
+                printf("inet_pton error for %s\n", argv[1]);
+		exit(0);
+}
+	if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
+		printf("connect error\n");
+		exit(0);
+	}
+	exit(0);
+}
diff --git a/11.client-server-print-ip-port-bothv2/daytimecli.o b/12.3 nodes communication/daytimecli.o
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/daytimecli.o
rename to 12.3 nodes communication/daytimecli.o
diff --git a/12.3 nodes communication/daytimesrv.c b/12.3 nodes communication/daytimesrv.c
new file mode 100644
index 0000000..12c17fd
--- /dev/null
+++ b/12.3 nodes communication/daytimesrv.c	
@@ -0,0 +1,63 @@
+
+
+#include	"../basic.h"
+#include	<time.h>
+
+int main(int argc, char **argv) {
+	int			listenfd, connfd, n;
+	struct sockaddr_in	servaddr;
+	char			buff[INET_ADDRSTRLEN];
+	short			port;
+
+	if (argc != 2 ){
+		printf("usage: daytimesrv <porta>\n");
+		exit(0);
+}
+	if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+		printf("socket error\n");
+		exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family      = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);   /* wildcard address */
+	servaddr.sin_port        = htons(atoi(argv[1])); /* server port */
+
+	if( (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) < 0){
+		printf("bind error\n"); exit(0);
+}
+	if( listen(listenfd, 5) < 0 )
+		{ printf("listen error\n");
+		  exit(0);
+		}
+
+	struct sockaddr_in	client_addr;
+	unsigned int client_addr_len = sizeof(client_addr);
+	
+	struct sockaddr_in	server_local_addr;
+	unsigned int server_local_addr_len = sizeof(server_local_addr);
+	
+	char * socket_buffer = (char *) malloc (server_local_addr_len) ;
+	
+	
+
+	for ( ; ; ) {
+		if( (connfd = accept(listenfd, (struct sockaddr *) &client_addr, &client_addr_len)) < 0)
+		{ printf("accept error\n");
+		exit(0);
+		} 
+
+		inet_ntop(AF_INET, &(client_addr.sin_addr), buff, INET_ADDRSTRLEN);// get client ip
+		port = ntohs(client_addr.sin_port);// get client port
+		
+		fprintf (stdout,"%s%c%hu\n",buff,':',port);
+		
+		
+		
+		getsockname (connfd, (struct sockaddr *) &server_local_addr, &server_local_addr_len);
+		memcpy (socket_buffer, &server_local_addr, server_local_addr_len);
+		write (connfd,socket_buffer, server_local_addr_len);
+		
+		
+		close(connfd);
+	}
+}
diff --git a/12.3 nodes communication/daytimesrv.c~ b/12.3 nodes communication/daytimesrv.c~
new file mode 100644
index 0000000..5a71bf1
--- /dev/null
+++ b/12.3 nodes communication/daytimesrv.c~	
@@ -0,0 +1,41 @@
+/* stampa l'ip del client */
+
+#include	"../basic.h"
+#include	<time.h>
+
+int main(int argc, char **argv) {
+	int			listenfd, connfd, n;
+	struct sockaddr_in	servaddr;
+	char			buff[MAXLINE];
+	time_t			ticks;
+
+	if (argc != 2 ){
+		printf("usage: daytimesrv <porta>\n");
+		exit(0);
+}
+	if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+		printf("socket error\n");
+		exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family      = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);   /* wildcard address */
+	servaddr.sin_port        = htons(atoi(argv[1])); /* server port */
+
+	if( (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) < 0){
+		printf("bind error\n"); exit(0);
+}
+	if( listen(listenfd, 5) < 0 )
+		{ printf("listen error\n");
+		  exit(0);
+}
+	for ( ; ; ) {
+		if( (connfd = accept(listenfd, (struct sockaddr *) NULL, NULL)) < 0)
+		{ printf("accept error\n"); exit(0);} else {
+		}
+
+		n=read(connfd, buff, MAXLINE);
+		fprintf (stdout,%s\n,buff);
+		close(connfd);
+	}
+}
diff --git a/12.3 nodes communication/daytimesrv.o b/12.3 nodes communication/daytimesrv.o
new file mode 100644
index 0000000..e160c2e
Binary files /dev/null and b/12.3 nodes communication/daytimesrv.o differ
diff --git a/12.3 nodes communication/makefile b/12.3 nodes communication/makefile
new file mode 100644
index 0000000..16fdd6d
--- /dev/null
+++ b/12.3 nodes communication/makefile	
@@ -0,0 +1,9 @@
+all : server client
+server : daytimesrv.o ../fun-corso-reti.o
+	gcc -o server daytimesrv.o ../fun-corso-reti.o
+client : daytimecli.o ../fun-corso-reti.o
+	gcc -o client daytimecli.o ../fun-corso-reti.o
+daytimesrv.o : daytimesrv.c ../basic.h
+	gcc -c -o daytimesrv.o daytimesrv.c
+fun-corso-reti.o : ../fun-corso-reti.c ../basic.h
+	gcc -c -o ../fun-corso-reti.o ../fun-corso-reti.c
diff --git a/12.3 nodes communication/makefile~ b/12.3 nodes communication/makefile~
new file mode 100644
index 0000000..ed76715
--- /dev/null
+++ b/12.3 nodes communication/makefile~	
@@ -0,0 +1,8 @@
+server : daytimesrv.o ../fun-corso-reti.o
+	gcc -o server daytimesrv.o ../fun-corso-reti.o
+client : daytimecli.o ../fun-corso-reti.o
+	gcc -o client daytimecli.o ../fun-corso-reti.o
+daytimesrv.o : daytimesrv.c ../basic.h
+	gcc -c -o daytimesrv.o daytimesrv.c
+fun-corso-reti.o : ../fun-corso-reti.c ../basic.h
+	gcc -c -o ../fun-corso-reti.o ../fun-corso-reti.c
diff --git a/11.client-server-print-ip-port-bothv2/readme b/12.3 nodes communication/readme
similarity index 100%
rename from 11.client-server-print-ip-port-bothv2/readme
rename to 12.3 nodes communication/readme
diff --git a/12.3 nodes communication/readme~ b/12.3 nodes communication/readme~
new file mode 100644
index 0000000..e69de29
diff --git a/12.3 nodes communication/server b/12.3 nodes communication/server
new file mode 100755
index 0000000..65d3aab
Binary files /dev/null and b/12.3 nodes communication/server differ
diff --git a/13.mail smtp test and errors/client b/13.mail smtp test and errors/client
new file mode 100755
index 0000000..423dc80
Binary files /dev/null and b/13.mail smtp test and errors/client differ
diff --git a/13.mail smtp test and errors/daytimecli.c b/13.mail smtp test and errors/daytimecli.c
new file mode 100644
index 0000000..811d59a
--- /dev/null
+++ b/13.mail smtp test and errors/daytimecli.c	
@@ -0,0 +1,94 @@
+
+
+#include	"../basic.h"
+#include    <unistd.h>
+
+void sigpipeaction (int signal){
+    
+	int status, pid;
+    
+    fprintf(stderr, "Sigpipe catturato\n");
+    
+    
+}
+
+
+int main(int argc, char **argv) {
+    
+    
+    struct sigaction sigpipestructure;
+    sigpipestructure.sa_handler = sigpipeaction;
+    sigpipestructure.sa_flags = 0;
+    
+    sigaction (SIGPIPE, &sigpipestructure, NULL);
+    
+    
+    
+    siginterrupt (SIGPIPE,1);
+    
+    
+    
+    
+	int			sockfd;
+	struct sockaddr_in	servaddr;
+
+	if (argc != 3){
+		printf("usage: daytimecli <indirizzoIP> <porta> \n");
+		exit(0);
+}
+        if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
+			printf("socket error\n");
+			exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+        servaddr.sin_port = htons(atoi(argv[2])); /* server port */ 
+
+        if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
+                printf("inet_pton error for %s\n", argv[1]);
+		exit(0);
+}
+	if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
+		printf("connect error\n");
+		exit(0);
+	}
+	
+	struct sockaddr_in	r_server_local_addr;
+	unsigned int r_server_local_addr_len = sizeof(r_server_local_addr);
+	
+	char * socket_buffer = (char *) malloc (r_server_local_addr_len) ;
+	int ridden;
+
+
+
+    
+    
+    for (int i = 0; i < 100; i ++){
+        
+	ridden = read (sockfd, socket_buffer,r_server_local_addr_len );
+	if (ridden < 0){
+		fprintf(stdout,"Errore durante la lettura\n");
+		exit(-1);
+	} else {
+		fprintf(stdout,"Ho letto  %d bytes\n",ridden);
+	}
+    }
+    
+
+    close(sockfd);
+
+	
+	memcpy (&r_server_local_addr,socket_buffer, r_server_local_addr_len);
+	
+	
+	char buff[INET_ADDRSTRLEN];
+	short port;
+	
+	inet_ntop(AF_INET, &(r_server_local_addr.sin_addr), buff, INET_ADDRSTRLEN);// get ip
+	port = ntohs(r_server_local_addr.sin_port);// get  port
+		
+	fprintf (stdout,"%s%c%hu\n",buff,':',port);
+	
+	
+	exit(0);
+}
diff --git a/13.mail smtp test and errors/daytimecli.c~ b/13.mail smtp test and errors/daytimecli.c~
new file mode 100644
index 0000000..239a866
--- /dev/null
+++ b/13.mail smtp test and errors/daytimecli.c~	
@@ -0,0 +1,31 @@
+/* Client che interroga un daytime server */
+
+#include	"../basic.h"
+
+int main(int argc, char **argv) {
+	int			sockfd, n;
+	char			recvline[MAXLINE + 1];
+	struct sockaddr_in	servaddr;
+
+	if (argc != 3){
+		printf("usage: daytimecli <indirizzoIP> <porta> \n");
+		exit(0);
+}
+        if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
+			printf("socket error\n");
+			exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+        servaddr.sin_port = htons(atoi(argv[2])); /* server port */ 
+
+        if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
+                printf("inet_pton error for %s\n", argv[1]);
+		exit(0);
+}
+	if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
+		printf("connect error\n");
+		exit(0);
+	}
+	exit(0);
+}
diff --git a/13.mail smtp test and errors/daytimecli.o b/13.mail smtp test and errors/daytimecli.o
new file mode 100644
index 0000000..3753eb4
Binary files /dev/null and b/13.mail smtp test and errors/daytimecli.o differ
diff --git a/13.mail smtp test and errors/daytimesrv.c b/13.mail smtp test and errors/daytimesrv.c
new file mode 100644
index 0000000..12c17fd
--- /dev/null
+++ b/13.mail smtp test and errors/daytimesrv.c	
@@ -0,0 +1,63 @@
+
+
+#include	"../basic.h"
+#include	<time.h>
+
+int main(int argc, char **argv) {
+	int			listenfd, connfd, n;
+	struct sockaddr_in	servaddr;
+	char			buff[INET_ADDRSTRLEN];
+	short			port;
+
+	if (argc != 2 ){
+		printf("usage: daytimesrv <porta>\n");
+		exit(0);
+}
+	if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+		printf("socket error\n");
+		exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family      = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);   /* wildcard address */
+	servaddr.sin_port        = htons(atoi(argv[1])); /* server port */
+
+	if( (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) < 0){
+		printf("bind error\n"); exit(0);
+}
+	if( listen(listenfd, 5) < 0 )
+		{ printf("listen error\n");
+		  exit(0);
+		}
+
+	struct sockaddr_in	client_addr;
+	unsigned int client_addr_len = sizeof(client_addr);
+	
+	struct sockaddr_in	server_local_addr;
+	unsigned int server_local_addr_len = sizeof(server_local_addr);
+	
+	char * socket_buffer = (char *) malloc (server_local_addr_len) ;
+	
+	
+
+	for ( ; ; ) {
+		if( (connfd = accept(listenfd, (struct sockaddr *) &client_addr, &client_addr_len)) < 0)
+		{ printf("accept error\n");
+		exit(0);
+		} 
+
+		inet_ntop(AF_INET, &(client_addr.sin_addr), buff, INET_ADDRSTRLEN);// get client ip
+		port = ntohs(client_addr.sin_port);// get client port
+		
+		fprintf (stdout,"%s%c%hu\n",buff,':',port);
+		
+		
+		
+		getsockname (connfd, (struct sockaddr *) &server_local_addr, &server_local_addr_len);
+		memcpy (socket_buffer, &server_local_addr, server_local_addr_len);
+		write (connfd,socket_buffer, server_local_addr_len);
+		
+		
+		close(connfd);
+	}
+}
diff --git a/13.mail smtp test and errors/daytimesrv.c~ b/13.mail smtp test and errors/daytimesrv.c~
new file mode 100644
index 0000000..5a71bf1
--- /dev/null
+++ b/13.mail smtp test and errors/daytimesrv.c~	
@@ -0,0 +1,41 @@
+/* stampa l'ip del client */
+
+#include	"../basic.h"
+#include	<time.h>
+
+int main(int argc, char **argv) {
+	int			listenfd, connfd, n;
+	struct sockaddr_in	servaddr;
+	char			buff[MAXLINE];
+	time_t			ticks;
+
+	if (argc != 2 ){
+		printf("usage: daytimesrv <porta>\n");
+		exit(0);
+}
+	if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+		printf("socket error\n");
+		exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family      = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);   /* wildcard address */
+	servaddr.sin_port        = htons(atoi(argv[1])); /* server port */
+
+	if( (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) < 0){
+		printf("bind error\n"); exit(0);
+}
+	if( listen(listenfd, 5) < 0 )
+		{ printf("listen error\n");
+		  exit(0);
+}
+	for ( ; ; ) {
+		if( (connfd = accept(listenfd, (struct sockaddr *) NULL, NULL)) < 0)
+		{ printf("accept error\n"); exit(0);} else {
+		}
+
+		n=read(connfd, buff, MAXLINE);
+		fprintf (stdout,%s\n,buff);
+		close(connfd);
+	}
+}
diff --git a/13.mail smtp test and errors/daytimesrv.o b/13.mail smtp test and errors/daytimesrv.o
new file mode 100644
index 0000000..e160c2e
Binary files /dev/null and b/13.mail smtp test and errors/daytimesrv.o differ
diff --git a/13.mail smtp test and errors/makefile b/13.mail smtp test and errors/makefile
new file mode 100644
index 0000000..16fdd6d
--- /dev/null
+++ b/13.mail smtp test and errors/makefile	
@@ -0,0 +1,9 @@
+all : server client
+server : daytimesrv.o ../fun-corso-reti.o
+	gcc -o server daytimesrv.o ../fun-corso-reti.o
+client : daytimecli.o ../fun-corso-reti.o
+	gcc -o client daytimecli.o ../fun-corso-reti.o
+daytimesrv.o : daytimesrv.c ../basic.h
+	gcc -c -o daytimesrv.o daytimesrv.c
+fun-corso-reti.o : ../fun-corso-reti.c ../basic.h
+	gcc -c -o ../fun-corso-reti.o ../fun-corso-reti.c
diff --git a/13.mail smtp test and errors/makefile~ b/13.mail smtp test and errors/makefile~
new file mode 100644
index 0000000..ed76715
--- /dev/null
+++ b/13.mail smtp test and errors/makefile~	
@@ -0,0 +1,8 @@
+server : daytimesrv.o ../fun-corso-reti.o
+	gcc -o server daytimesrv.o ../fun-corso-reti.o
+client : daytimecli.o ../fun-corso-reti.o
+	gcc -o client daytimecli.o ../fun-corso-reti.o
+daytimesrv.o : daytimesrv.c ../basic.h
+	gcc -c -o daytimesrv.o daytimesrv.c
+fun-corso-reti.o : ../fun-corso-reti.c ../basic.h
+	gcc -c -o ../fun-corso-reti.o ../fun-corso-reti.c
diff --git a/13.mail smtp test and errors/readme b/13.mail smtp test and errors/readme
new file mode 100644
index 0000000..e69de29
diff --git a/13.mail smtp test and errors/readme~ b/13.mail smtp test and errors/readme~
new file mode 100644
index 0000000..e69de29
diff --git a/13.mail smtp test and errors/server b/13.mail smtp test and errors/server
new file mode 100755
index 0000000..65d3aab
Binary files /dev/null and b/13.mail smtp test and errors/server differ