-int recipients_max = 0;
-const pcre *regex_AUTH = NULL;
-const pcre *regex_check_dns_names = NULL;
-const pcre *regex_From = NULL;
-const pcre *regex_IGNOREQUOTA = NULL;
-const pcre *regex_PIPELINING = NULL;
-const pcre *regex_SIZE = NULL;
-#ifdef SUPPORT_PIPE_CONNECT
-const pcre *regex_EARLY_PIPE = NULL;
-#endif
-const pcre *regex_ismsgid = NULL;
-const pcre *regex_smtp_code = NULL;
-uschar *regex_vars[REGEX_VARS];
+int recipients_max = 50000;
+const pcre2_code *regex_AUTH = NULL;
+const pcre2_code *regex_check_dns_names = NULL;
+const pcre2_code *regex_From = NULL;
+const pcre2_code *regex_IGNOREQUOTA = NULL;
+const pcre2_code *regex_PIPELINING = NULL;
+const pcre2_code *regex_SIZE = NULL;
+#ifndef DISABLE_PIPE_CONNECT
+const pcre2_code *regex_EARLY_PIPE = NULL;
+#endif
+const pcre2_code *regex_ismsgid = NULL;
+const pcre2_code *regex_smtp_code = NULL;
+const uschar *regex_vars[REGEX_VARS];