Lib.rs

Cargo Features

[dependencies]
lettre = { version = "0.11.19", default-features = false, features = ["builder", "mime03", "file-transport", "file-transport-envelope", "sendmail-transport", "smtp-transport", "pool", "rustls", "aws-lc-rs", "fips", "ring", "webpki-roots", "rustls-tls", "boring-tls", "async-std1", "async-std1-rustls", "async-std1-rustls-tls", "tokio1", "tokio1-native-tls", "tokio1-rustls", "tokio1-rustls-tls", "tokio1-boring-tls", "dkim", "web", "tracing", "hostname", "rustls-platform-verifier", "rustls-native-certs"] }

default = builder, hostname, native-tls, pool, smtp-transport

These default features are set whenever lettre is added without default-features = false somewhere in the dependency tree.

builder default

Enables email-encoding, fastrand, httpdate, mime, and quoted_printable

Affects lettre::message, transport::Transport.send, transport::AsyncTransport.send…

mime03

Enables mime

file-transport file-transport-envelope?

transports

Enables fs and io-util of optional tokio and uuid

file transport

Affects executor::Executor.fs_write, transport::file…

file-transport-envelope = file-transport, serde

Enables serde_json

Affects executor::Executor.fs_read…

sendmail-transport

Enables unstable of optional async-std, io-util and process of optional tokio

Affects transport::sendmail…

smtp-transport default

Enables url, base64, nom, percent-encoding, and socket2, net, rt and time of optional tokio

Affects executor::Executor.spawn, executor::Executor.sleep, executor::Executor.connect, transport::smtp…

pool default

Enables futures-util

rustls async-std1-rustls? rustls-tls? tokio1-rustls?

Enables rustls

Affects tls::TlsVersion…

aws-lc-rs fips?

Enables aws-lc-rs of optional rustls

rustls:

Alias because Cargo features commonly use -

fips = aws-lc-rs

Enables fips of optional rustls

ring rustls-tls?

Enables ring of optional rustls

webpki-roots rustls-tls?

Enables webpki-roots

rustls-tls async-std1-rustls-tls? tokio1-rustls-tls? = ring, rustls, webpki-roots

deprecated

boring-tls tokio1-boring-tls?

Enables boring

Affects tls::TlsVersion…

async-std1 async-std1-rustls?

async

Enables async-std, async-trait, futures-io, and futures-util

Affects executor::AsyncStd1Executor, file::AsyncFileTransport, transport::AsyncTransport, sendmail::AsyncSendmailTransport, stub::AsyncStubTransport…

async-std1-rustls async-std1-rustls-tls? = async-std1, rustls

Enables futures-rustls

async-std1-rustls-tls = async-std1-rustls, rustls-tls

deprecated

tokio1 tokio1-boring-tls? tokio1-native-tls? tokio1-rustls?

Enables async-trait, futures-io, futures-util, and tokio

futures-io:

async

Affects executor::Tokio1Executor, async_net::AsyncTokioStream, file::AsyncFileTransport, transport::AsyncTransport, sendmail::AsyncSendmailTransport, stub::AsyncStubTransport…

tokio1-native-tls = native-tls, tokio1

Enables tokio-native-tls

tokio1-rustls tokio1-rustls-tls? = rustls, tokio1

Enables tokio-rustls

tokio1-rustls-tls = rustls-tls, tokio1-rustls

deprecated

tokio1-boring-tls = boring-tls, tokio1

Enables tokio-boring

dkim

Enables base64, ed25519-dalek, rsa, and sha2

Affects message::dkim…

web

wasm support

Enables web-time

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

tracing implicit feature

Enables tracing

tracing support

serde file-transport-envelope?

hostname default

Enables hostname

feature

native-tls default tokio1-native-tls?

Enables native-tls

tls
feature

Affects tls::TlsVersion…

rustls-platform-verifier implicit feature

rustls-native-certs implicit feature

Enables rustls-native-certs

rustls-native-certs:

rustls-native-certs allows rustls to use the platform native certificate store