--- ssmtp.c-old	2005-12-06 02:51:51.000000000 +0100
+++ ssmtp.c	2005-12-06 02:52:13.000000000 +0100
@@ -480,6 +480,11 @@
 				die("from_format() -- snprintf() failed");
 			}
 		}
+		else {
+			if(snprintf(buf, BUF_SZ, "\"unknown\" <%s>", str) == -1) {
+				die("from_format() -- snprintf() failed");
+			}
+		}
 	}
 
 #if 0