async-mailer

A set of async generic Mailer and dynamic dyn DynMailer traits with runtime-pluggable Microsoft Outlook (Office365) and SMTP implementations.

Installation

Add to your Cargo.toml:

toml async-mailer = "0.3.5"

You can control the re-exported mailer implementations, as well as tracing support, via crate feature toggles.

By default, features smtp, outlook and tracing are enabled. Use default-features = false and features = [...] to select features individually.

Examples:

Use new for a strongly typed mailer instance, or new_box / new_arc for a type-erased dynamic mailer.

Microsoft Outlook (Office365) and SMTP variants are available.

Using the strongly typed Mailer:

``rust // BothOutlookMailerandSmtpMailerimplementMailer // and can be used withimpl Maileror` bounds.

use async_mailer::{ IntoMessage, Mailer, OutlookMailer, SmtpMailer };

let mailer: OutlookMailer = OutlookMailer::new( "".into(), "".into(), async_mailer::Secret::new("".into()) ).await?;

// Alternative:

let mailer: SmtpMailer = SmtpMailer::new( "smtp.example.com".into(), 465, asyncmailer::SmtpInvalidCertsPolicy::Deny, "".into(), asyncmailer::Secret::new("".into()) );

// Further alternative mailers can be implemented by third parties.

// Build a message using the re-exported mail_builder::MessageBuilder'. // // For blazingly fast rendering of beautiful HTML mail, // I recommend combiningaskamawithmrml`.

let message = asyncmailer::MessageBuilder::new() .from(("From Name", "from@example.com")) .to("to@example.com") .subject("Subject") .textbody("Mail body") .into_message()?;

// Send the message using the strongly typed Mailer.

mailer.send_mail(message).await?; ```

Using the dynamically typed dyn DynMailer / BoxMailer / ArcMailer:

```rust use async_mailer::{ BoxMailer, IntoMessage, OutlookMailer, SmtpMailer };

// Both OutlookMailer and SmtpMailer implement DynMailer and can be used as trait objects. // Here they are used as BoxMailer, which is an alias to Box<dyn DynMailer>.

let mailer: BoxMailer = OutlookMailer::newbox( // Or OutlookMailer::new_arc(). "".into(), "".into(), asyncmailer::Secret::new("".into()) ).await?;

// Alternative:

let mailer: BoxMailer = SmtpMailer::newbox( // Or SmtpMailer::new_arc(). "smtp.example.com".into(), 465, asyncmailer::SmtpInvalidCertsPolicy::Deny, "".into(), async_mailer::Secret::new("".into()) );

// Further alternative mailers can be implemented by third parties.

// The trait object is Send and Sync and may be stored e.g. as part of your server state.

// Build a message using the re-exported mail_builder::MessageBuilder'. // // For blazingly fast rendering of beautiful HTML mail, // I recommend combiningaskamawithmrml`.

let message = asyncmailer::MessageBuilder::new() .from(("From Name", "from@example.com")) .to("to@example.com") .subject("Subject") .textbody("Mail body") .into_message()?;

// Send the message using the implementation-agnostic dyn DynMailer.

mailer.send_mail(message).await?; ```

Feature flags

• outlook: Enable OutlookMailer.
• smtp: Enable SmtpMailer.
• tracing: Enable debug and error logging using the tracing crate.
• clap: Implement clap::ValueEnum for SmtpInvalidCertsPolicy. This allows for easily configured CLI options like --invalid-certs <allow|deny>.

Default: outlook, smtp, tracing.

Roadmap

• DKIM support is planned to be implemented on the SmtpMailer.
• Access token auto-refresh is planned to be implemented on the OutlookMailer.

Further mailer implementations are possible. Please open an issue and ideally provide a pull request to add your alternative mailer implementation!