diff -up sendmail-8.14.3/sendmail/conf.c.switchfile sendmail-8.14.3/sendmail/conf.c
--- sendmail-8.14.3/sendmail/conf.c.switchfile	2008-04-14 04:09:35.000000000 +0200
+++ sendmail-8.14.3/sendmail/conf.c	2009-12-15 13:32:55.000000000 +0100
@@ -968,7 +968,7 @@ switch_map_find(service, maptype, mapret
 				p = strpbrk(buf, "#\n");
 				if (p != NULL)
 					*p = '\0';
-				p = strpbrk(buf, " \t");
+				p = strpbrk(buf, " \t:");
 				if (p != NULL)
 					*p++ = '\0';
 				if (buf[0] == '\0')