Update API.md

Tweak
diff --git a/source/markdown/docs/API.md b/source/markdown/docs/API.md
index 0ff530e..15a9d95 100644
--- a/source/markdown/docs/API.md
+++ b/source/markdown/docs/API.md
@@ -57,7 +57,7 @@
     - $to: Optional To: address
     - $subject: Optional Subject: line
     - $body: Optional body text
-    - quick: send statistics only (exclude emails, participants, threadstruct, word-cloud)
+    - quick: send statistics only (exclude emails apart from epoch, participants, threadstruct, word-cloud)
     - emailsOnly: return email summaries only (omit thread_struct, top 10 participants and word-cloud)
     
 Response example: