Reduce rate limit to 9

CHANGELOG.md

@@ -13,7 +13,7 @@ and this project adheres to
 ### Added
 
 - `DomainChanges.tls`
-- Rate limiting (default 10/s), configurable with `RATE_LIMIT` env variable (async only)
+- Rate limiting (default 9/s), configurable with `RATE_LIMIT` env variable (async only)
 
 ### Changed
 

README.md

@@ -36,7 +36,7 @@ Crate documentation is available in [docsrs][docs-url]. Example usage is availab
 - `RESEND_BASE_URL` to override the default base address:
   `https://api.resend.com` (Optional).
 - `RATE_LIMIT` to set the maximum amount of requests you can send per second. By default, this is
-  10 as that is what Resend defaults to. In reality, the time window is set to 1.1s to avoid
+  9 (Resend defaults to 10). In reality, the time window is set to 1.1s to avoid
   failures. This is thread-safe (as long as you use the same `Resend` client across threads!)
 
 > <div class="warning">WARNING: Rate limiting only works when using the async version (default) of the crate</div>

src/config.rs

@@ -41,7 +41,7 @@ impl Config {
         // ==== Rate limiting is a non-blocking thing only ====
         #[cfg(not(feature = "blocking"))]
         let rate_limit_per_sec = env::var("RATE_LIMIT")
-            .unwrap_or_else(|_| "10".to_owned())
+            .unwrap_or_else(|_| "9".to_owned())
             .parse::<u32>()
             .expect("env variable `RATE_LIMIT` should be a valid u32");