diff --git a/configure.ac b/configure.ac
index 4714c00..989d703 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,5 +42,11 @@ PKG_CHECK_MODULES([GIO], gio-2.0)
 PKG_CHECK_MODULES([GLIB], glib-2.0)
 PKG_CHECK_MODULES([GTHREAD], gthread-2.0)
 PKG_CHECK_MODULES([SQLITE3], sqlite3)
+PKG_CHECK_MODULES([CURL], libcurl)
+LIBCURL_CHECK_CONFIG
+if test "$libcurl_protocol_SMTP" != "yes"; then
+	echo "Your libCURL installation does not support the SMTP protocol."
+	exit 1
+fi
 
 AC_OUTPUT(Makefile wmud/Makefile docs/reference/wmud/Makefile create-world.sh drop-world.sh)
diff --git a/wmud/Makefile.am b/wmud/Makefile.am
index 2ac09b8..8320055 100644
--- a/wmud/Makefile.am
+++ b/wmud/Makefile.am
@@ -1,5 +1,5 @@
 bin_PROGRAMS = wmud
-AM_CPPFLAGS = -DWMUD_STATEDIR=\""$(localstatedir)"\" -DWMUD_CONFDIR=\""$(sysconfdir)"\" $(MEMCACHED_CFLAGS) $(GLIB_CFLAGS) $(GIO_CFLAGS) $(GTHREAD_CFLAGS) $(SQLITE3_CFLAGS)
+AM_CPPFLAGS = -DWMUD_STATEDIR=\""$(localstatedir)"\" -DWMUD_CONFDIR=\""$(sysconfdir)"\" $(MEMCACHED_CFLAGS) $(GLIB_CFLAGS) $(GIO_CFLAGS) $(GTHREAD_CFLAGS) $(SQLITE3_CFLAGS) $(CURL_CFLAGS)
 
 wmud_SOURCES = main.c game-networking.c interpreter.c db.c players.c maintenance.c game.c configuration.c world.c menu.c
-wmud_LDADD = $(MEMCACHED_LIBS) $(GLIB_LIBS) $(GIO_LIBS) $(GTHREAD_LIBS) $(SQLITE3_LIBS)
+wmud_LDADD = $(MEMCACHED_LIBS) $(GLIB_LIBS) $(GIO_LIBS) $(GTHREAD_LIBS) $(SQLITE3_LIBS) $(CURL_LIBS)