+ /* Set up a string for adding to the retry key if the port number is not
+ the standard SMTP port. A host may have its own port setting that overrides
+ the default. */
+
+ pistring = string_sprintf(":%d", (host->port == PORT_NONE)?
+ port : host->port);
+ if (Ustrcmp(pistring, ":25") == 0) pistring = US"";
+