+int port = 0;
+uschar *endptr;
+
+/* Handle the "bracketed with colon on the end" format */
+
+if (*address == '[')
+ {
+ uschar *rb = address + 1;
+ while (*rb != 0 && *rb != ']') rb++;
+ if (*rb++ == 0) return 0; /* Missing ]; leave invalid address */
+ if (*rb == ':')
+ {
+ port = Ustrtol(rb + 1, &endptr, 10);
+ if (*endptr != 0) return 0; /* Invalid port; leave invalid address */
+ }
+ else if (*rb != 0) return 0; /* Bad syntax; leave invalid address */
+ memmove(address, address + 1, rb - address - 2);
+ rb[-2] = 0;
+ }
+
+/* Handle the "dot on the end" format */
+
+else