Available on crate feature
file-transport
only.Expand description
The file transport writes the emails to the given directory. The name of the file will be
message_id.eml
.
It can be useful for testing purposes, or if you want to keep track of sent messages.
Sync example
use std::env::temp_dir;
use lettre::{FileTransport, Message, Transport};
// Write to the local temp directory
let sender = FileTransport::new(temp_dir());
let email = Message::builder()
.from("NoBody <nobody@domain.tld>".parse()?)
.reply_to("Yuin <yuin@domain.tld>".parse()?)
.to("Hei <hei@domain.tld>".parse()?)
.subject("Happy new year")
.body(String::from("Be happy!"))?;
let result = sender.send(&email);
assert!(result.is_ok());
Sync example with envelope
It is possible to also write the envelope content in a separate JSON file
by using the with_envelope
builder. The JSON file will be written in the
target directory with same name and a json
extension.
use std::env::temp_dir;
use lettre::{FileTransport, Message, Transport};
// Write to the local temp directory
let sender = FileTransport::with_envelope(temp_dir());
let email = Message::builder()
.from("NoBody <nobody@domain.tld>".parse()?)
.reply_to("Yuin <yuin@domain.tld>".parse()?)
.to("Hei <hei@domain.tld>".parse()?)
.subject("Happy new year")
.body(String::from("Be happy!"))?;
let result = sender.send(&email);
assert!(result.is_ok());
Async tokio 1.x
use std::env::temp_dir;
use lettre::{AsyncFileTransport, AsyncTransport, Message, Tokio1Executor};
// Write to the local temp directory
let sender = AsyncFileTransport::<Tokio1Executor>::new(temp_dir());
let email = Message::builder()
.from("NoBody <nobody@domain.tld>".parse()?)
.reply_to("Yuin <yuin@domain.tld>".parse()?)
.to("Hei <hei@domain.tld>".parse()?)
.subject("Happy new year")
.body(String::from("Be happy!"))?;
let result = sender.send(email).await;
assert!(result.is_ok());
Async async-std 1.x
use std::env::temp_dir;
use lettre::{AsyncFileTransport, AsyncStd1Executor, AsyncTransport, Message};
// Write to the local temp directory
let sender = AsyncFileTransport::<AsyncStd1Executor>::new(temp_dir());
let email = Message::builder()
.from("NoBody <nobody@domain.tld>".parse()?)
.reply_to("Yuin <yuin@domain.tld>".parse()?)
.to("Hei <hei@domain.tld>".parse()?)
.subject("Happy new year")
.body(String::from("Be happy!"))?;
let result = sender.send(email).await;
assert!(result.is_ok());
Example email content result
From: NoBody <nobody@domain.tld>
Reply-To: Yuin <yuin@domain.tld>
To: Hei <hei@domain.tld>
Subject: Happy new year
Date: Tue, 18 Aug 2020 22:50:17 GMT
Be happy!
Example envelope result
{"forward_path":["hei@domain.tld"],"reverse_path":"nobody@domain.tld"}
Structs
- AsyncFileTransport
tokio1
orasync-std1
Asynchronously writes the content and the envelope information to a file - The Errors that may occur when sending an email over SMTP
- Writes the content and the envelope information to a file