New POP3 server feature: Append "#nospam" to your login name/alias and any

SPAM-tagged messages will not be listed/downloaded. This is useful if for
example you use POP3 to download mail to your phone and have limited
storage or sorting options. The SPAM-tagged messages will remain in your
inbox on the BBS so you should use another POP3 or local mail client to
download and delete those messages (which could potentially include
false positives).

src/sbbs3/mailsrvr.c

@@ -63,6 +63,7 @@
 static const char*	server_name="Synchronet Mail Server";
 #define FORWARD			"forward:"
 #define NO_FORWARD		"local:"
+#define NO_SPAM			"#nospam"
 
 int dns_getmx(char* name, char* mx, char* mx2
 			  ,DWORD intf, DWORD ip_addr, BOOL use_tcp, int timeout);
@@ -811,6 +812,7 @@ static void pop3_thread(void* arg)
 	BOOL		activity=TRUE;
 	BOOL		apop=FALSE;
 	uint32_t	l;
+	long		lm_mode = 0;
 	ulong		lines;
 	ulong		lines_sent;
 	ulong		login_attempts;
@@ -940,6 +942,11 @@ static void pop3_thread(void* arg)
 				response=p;
 		}
 		SAFECOPY(username,p);
+		if((p = strstr(username, NO_SPAM)) != NULL) {
+			*p = 0;
+			lm_mode = LM_NOSPAM;
+		} else
+			lm_mode = 0;
 		if(!apop) {
 			sockprintf(socket,"+OK");
 			if(!sockgetrsp(socket,"PASS ",buf,sizeof(buf))) {
@@ -1030,7 +1037,7 @@ static void pop3_thread(void* arg)
 			break;
 		}
 
-		mail=loadmail(&smb,&msgs,user.number,MAIL_YOUR,0);
+		mail=loadmail(&smb,&msgs,user.number,MAIL_YOUR,lm_mode);
 
 		for(l=bytes=0;l<msgs;l++) {
 			msg.hdr.number=mail[l].number;