From a83f927109d7f7b62abeede8b6049a12fa830112 Mon Sep 17 00:00:00 2001
From: Paolo Barbolini <paolo@paolo565.org>
Date: Tue, 8 Sep 2020 21:32:20 +0200
Subject: [PATCH] pool: document pool defaults

---
 src/transport/smtp/transport.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/transport/smtp/transport.rs b/src/transport/smtp/transport.rs
index 9609774..78c3429 100644
--- a/src/transport/smtp/transport.rs
+++ b/src/transport/smtp/transport.rs
@@ -145,7 +145,14 @@ impl SmtpTransportBuilder {
         SmtpTransport { inner: pool }
     }
 
-    /// Build the transport (with default pool if enabled)
+    /// Build the transport
+    ///
+    /// If the `r2d2` feature is enabled an `Arc` wrapped pool is be created.
+    /// Defaults:
+    ///
+    /// * 60 seconds idle timeout
+    /// * 30 minutes max connection lifetime
+    /// * max pool size of 10 connections
     pub fn build(self) -> SmtpTransport {
         let client = self.build_client();
         SmtpTransport {