diff --git a/usr.bin/mail/collect.c b/usr.bin/mail/collect.c
--- a/usr.bin/mail/collect.c
+++ b/usr.bin/mail/collect.c
@@ -698,7 +698,7 @@
 
 /*ARGSUSED*/
 void
-collhup(int s __unused)
+collhup(int signo)
 {
 	rewind(collf);
 	savedeadletter(collf);
@@ -706,7 +706,10 @@
 	 * Let's pretend nobody else wants to clean up,
 	 * a true statement at this time.
 	 */
-	exit(1);
+	signal(signo, SIG_DFL);
+	raise(signo);
+	/* NOT REACHED */
+	_exit(128 + signo);
 }
 
 void