feat: use rust based smtp implementation

Cargo.toml

@@ -21,6 +21,8 @@ libsqlite3-sys = { version = "0.14.0", features = ["bundled"] }
 reqwest = "0.9.15"
 num-derive = "0.2.5"
 num-traits = "0.2.6"
+native-tls = "0.2.3"
+lettre = "0.9.0"
 
 [dev-dependencies]
 tempfile = "3.0.7"
@@ -37,3 +39,7 @@ name = "simple"
 name = "repl"
 path = "examples/repl/main.rs"
 
+
+[features]
+default = []
+vendored = ["native-tls/vendored"]