diff --git a/ENV-NOTES b/ENV-NOTES
index e6c2926..85616d0 100644
--- a/ENV-NOTES
+++ b/ENV-NOTES
@@ -45,20 +45,22 @@ each and are processed efficiently.  I feel the defaults are low and
 encourage you to raise them.
 
 MAX_SEND         - maximum size of a response message to send over the wire,
-                   in bytes.  Defaults to 350,000 and will treat smaller
-                   values as the same because standard Electrum protocol
-                   header chunk requests are nearly that large.
+                   in bytes.  Defaults to 1,000,000 and will treat values
+                   smaller than 350,000 as 350,000 because standard Electrum
+                   protocol header chunk requests are almost that large.
                    The Electrum protocol has a flaw in that address
                    histories must be served all at once or not at all,
                    an obvious avenue for abuse.  MAX_SEND is a
                    stop-gap until the protocol is improved to admit
                    incremental history requests.  Each history entry
                    is appoximately 100 bytes so the default is
-                   equivalent to a history limit of around 3,500
+                   equivalent to a history limit of around 10,000
                    entries, which should be ample for most legitimate
-                   users.  Increasing by a single-digit factor is
-                   likely fine but bear in mind one client can request
-                   history for multiple addresses.
+                   users.  If you increase this bear in mind one client
+                   can request history for multiple addresses.  Also,
+                   the largest raw transaction you will be able to serve
+                   to a client is just under half of MAX_SEND, as each raw
+                   byte becomes 2 hexadecimal ASCII characters on the wire.
 MAX_SUBS         - maximum number of address subscriptions across all
                    sessions.  Defaults to 250,000.
 MAX_SESSION_SUBS - maximum number of address subscriptions permitted to a