+/*
+ * Standard buffer size for string datatypes. DO NOT CHANGE! Not only does
+ * there exist a minimum buffer size for certain protocols (such as IMAP), but
+ * fixed-length buffers are now stored in some of the data structures on disk,
+ * so if you change the buffer size you'll fux0r your database.
+ */
+#define SIZ 4096
+
+/*
+ * If the body of a message is beyond this size, it will be stored in
+ * a separate table.
+ */
+#define BIGMSG 1024
+
+/*
+ * 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"