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Updated email processing.

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- Added an option to enable smtp debugging via SMTP_DEBUG. This will
  trigger a trace of the smtp commands sent/received to/from the mail
server. Useful when troubleshooting.
- Added two options to ignore invalid certificates which either do not
  match at all, or only doesn't match the hostname.
- Updated lettre to the latest alpha.4 version.
This commit is contained in:
BlackDex 2020-11-18 12:07:08 +01:00
parent 3fed323385
commit 6faaeaae66
6 changed files with 117 additions and 60 deletions
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41
src/mail.rs
View file

@ -7,6 +7,7 @@ use percent_encoding::{percent_encode, NON_ALPHANUMERIC};
use lettre::{
message::{header, Mailbox, Message, MultiPart, SinglePart},
transport::smtp::authentication::{Credentials, Mechanism as SmtpAuthMechanism},
transport::smtp::client::{Tls, TlsParameters},
transport::smtp::extension::ClientId,
Address, SmtpTransport, Transport,
};
@ -22,21 +23,30 @@ fn mailer() -> SmtpTransport {
use std::time::Duration;
let host = CONFIG.smtp_host().unwrap();
// Determine security
let smtp_client = if CONFIG.smtp_ssl() {
if CONFIG.smtp_explicit_tls() {
SmtpTransport::relay(host.as_str())
} else {
SmtpTransport::starttls_relay(host.as_str())
}
} else {
Ok(SmtpTransport::builder_dangerous(host.as_str()))
};
let smtp_client = smtp_client.unwrap()
let smtp_client = SmtpTransport::builder_dangerous(host.as_str())
.port(CONFIG.smtp_port())
.timeout(Some(Duration::from_secs(CONFIG.smtp_timeout())));
// Determine security
let smtp_client = if CONFIG.smtp_ssl() {
let mut tls_parameters = TlsParameters::builder(host);
if CONFIG.smtp_accept_invalid_hostnames() {
tls_parameters.dangerous_accept_invalid_hostnames(true);
}
if CONFIG.smtp_accept_invalid_certs() {
tls_parameters.dangerous_accept_invalid_certs(true);
}
let tls_parameters = tls_parameters.build().unwrap();
if CONFIG.smtp_explicit_tls() {
smtp_client.tls(Tls::Wrapper(tls_parameters))
} else {
smtp_client.tls(Tls::Required(tls_parameters))
}
} else {
smtp_client
};
let smtp_client = match (CONFIG.smtp_username(), CONFIG.smtp_password()) {
(Some(user), Some(pass)) => smtp_client.credentials(Credentials::new(user, pass)),
_ => smtp_client,
@ -318,14 +328,17 @@ fn send_email(address: &str, subject: &str, body_html: &str, body_text: &str) ->
// The boundary generated by Lettre it self is mostly too large based on the RFC822, so we generate one our selfs.
use uuid::Uuid;
let boundary = format!("_Part_{}_", Uuid::new_v4().to_simple());
let unique_id = Uuid::new_v4().to_simple();
let boundary = format!("_Part_{}_", unique_id);
let alternative = MultiPart::alternative().boundary(boundary).singlepart(text).singlepart(html);
let smtp_from = &CONFIG.smtp_from();
let email = Message::builder()
.message_id(Some(format!("<{}.{}>", unique_id, smtp_from)))
.to(Mailbox::new(None, Address::from_str(&address)?))
.from(Mailbox::new(
Some(CONFIG.smtp_from_name()),
Address::from_str(&CONFIG.smtp_from())?,
Address::from_str(smtp_from)?,
))
.subject(subject)
.multipart(alternative)?;