use crate::{settings::structs::Settings, LemmyError}; use lettre::{ message::{header, Mailbox, MultiPart, SinglePart}, transport::smtp::{ authentication::Credentials, client::{Tls, TlsParameters}, extension::ClientId, }, Address, Message, SmtpTransport, Transport, }; use std::str::FromStr; use uuid::Uuid; pub fn send_email( subject: &str, to_email: &str, to_username: &str, html: &str, settings: &Settings, ) -> Result<(), LemmyError> { let email_config = settings .email .to_owned() .ok_or_else(|| LemmyError::from_message("no_email_setup"))?; let domain = settings.hostname.to_owned(); let (smtp_server, smtp_port) = { let email_and_port = email_config.smtp_server.split(':').collect::>(); if email_and_port.len() == 1 { return Err(LemmyError::from_message( "email.smtp_server needs a port, IE smtp.xxx.com:465", )); } ( email_and_port[0], email_and_port[1] .parse::() .expect("email needs a port"), ) }; let email = Message::builder() .from( email_config .smtp_from_address .parse() .expect("email from address isn't valid"), ) .to(Mailbox::new( Some(to_username.to_string()), Address::from_str(to_email).expect("email to address isn't valid"), )) .message_id(Some(format!("{}@{}", Uuid::new_v4(), settings.hostname))) .subject(subject) .multipart( MultiPart::mixed().multipart( MultiPart::alternative() .singlepart( SinglePart::builder() .header(header::ContentType::TEXT_PLAIN) .body(html.to_string()), ) .multipart( MultiPart::related().singlepart( SinglePart::builder() .header(header::ContentType::TEXT_HTML) .body(html.to_string()), ), ), ), ) .expect("email built incorrectly"); // don't worry about 'dangeous'. it's just that leaving it at the default configuration // is bad. let mut builder = SmtpTransport::builder_dangerous(smtp_server).port(smtp_port); // Set the TLS if email_config.use_tls { let tls_config = TlsParameters::new(smtp_server.to_string()).expect("the TLS backend is happy"); builder = builder.tls(Tls::Wrapper(tls_config)); } // Set the creds if they exist if let (Some(username), Some(password)) = (email_config.smtp_login, email_config.smtp_password) { builder = builder.credentials(Credentials::new(username, password)); } let mailer = builder.hello_name(ClientId::Domain(domain)).build(); let result = mailer.send(&email); match result { Ok(_) => Ok(()), Err(e) => Err(LemmyError::from(e).with_message("email_send_failed")), } }