+/*
+ * SMTP delivery retry rules (all values are in seconds)
+ *
+ * If delivery of a message via SMTP is unsuccessful, Citadel will try again
+ * after SMTP_RETRY_INTERVAL seconds. This interval will double after each
+ * unsuccessful delivery, up to a maximum of SMTP_RETRY_MAX seconds. If no
+ * successful delivery has been accomplished after SMTP_GIVE_UP seconds, the
+ * message will be returned to its sender.
+ */
+#define SMTP_RETRY_INTERVAL 300 /* 5 minutes */
+#define SMTP_RETRY_MAX 43200 /* 12 hours */
+#define SMTP_GIVE_UP 432000 /* 5 days */
+
+/*
+ * Who bounced messages appear to be from
+ */
+#define BOUNCESOURCE "Citadel Mail Delivery Subsystem"
+
+/*
+ * This variable defines the amount of network spool data that may be carried
+ * in one server transfer command. For some reason, some networks get hung
+ * up on larger packet sizes. We don't know why. In any case, never set the
+ * packet size higher than 4096 or your server sessions will crash.
+ */
+#define IGNET_PACKET_SIZE 4000