basic.rs failing to compile without async-std

[ahcm]

Without the async-smtp dependency the compilation of the example/basic.rs failed with:

 let messages: Vec<_> = messages_stream.collect::<Result<_>>().await?;
   |                                            ^^^^^^^ method cannot be called on `impl async_std::stream::Stream+std::marker::Send` due to unsatisfied trait bounds

[zoechi]

Same here. I wasn't able to find a workaround

[zoechi]

I could solve this with

use futures::TryStreamExt;
...
let messages: Vec<_> = TryStreamExt::try_collect(messages_stream).await.unwrap();