* Executor * Move transports inside the transport module * AsyncTransport refactor * Update examples * Update docs * impl Default for AsyncSendmailTransport * Implement AsyncFileTransport::read * Generalize AsyncFileTransport AsyncTransport implementation * Remove remaining uses of AsyncSmtpConnector
* Add async-std support to smtp transport * fix Tls import * fix copy paste * too many imports * Temporarely skip async-std native-tls support * Fix panic message * TlsParameters: use rustls when async-std is enabled