forget to add new file

src/dev/peerat/backend/MailConfiguration.java

@@ -0,0 +1,39 @@
+package dev.peerat.backend;
+
+public class MailConfiguration {
+	String username;
+	String password;
+	String smtpHost;
+	String smtpPort;
+	String fromAddress;
+	
+	public MailConfiguration(String initUsername, String initPassword, String initSmtpHost, String initSmtpPort, String initFromAddress) {
+		username = initUsername;
+		password = initPassword;
+		smtpHost = initSmtpHost;
+		smtpPort = initSmtpPort;
+		fromAddress = initFromAddress.isBlank() ? "cyberbottle@peerat.dev" : initFromAddress;
+	}
+
+	public String getUsername() {
+		return username;
+	}
+
+	public String getPassword() {
+		return password;
+	}
+
+	public String getSmtpHost() {
+		return smtpHost;
+	}
+
+	public String getSmtpPort() {
+		return smtpPort;
+	}
+	
+	public String getFromAddress() {
+		return fromAddress;
+	}
+	
+	
+}

src/dev/peerat/backend/utils/Mail.java

@@ -0,0 +1,45 @@
+package dev.peerat.backend.utils;
+
+import java.util.Properties;
+
+import dev.peerat.backend.MailConfiguration;
+import jakarta.mail.Message;
+import jakarta.mail.MessagingException;
+import jakarta.mail.PasswordAuthentication;
+import jakarta.mail.Session;
+import jakarta.mail.Transport;
+import jakarta.mail.internet.InternetAddress;
+import jakarta.mail.internet.MimeMessage;
+
+
+public class Mail {
+    public static void send(String toAddress, String subject, String text, MailConfiguration mailConfiguration) {
+
+        Properties props = new Properties();
+        props.put("mail.smtp.starttls.enable", "true");
+        props.put("mail.smtp.auth", "true");
+        props.put("mail.smtp.host", mailConfiguration.getSmtpHost());
+        props.put("mail.smtp.port", mailConfiguration.getSmtpPort());
+
+        Session session = Session.getInstance(props,
+          new jakarta.mail.Authenticator() {
+            protected PasswordAuthentication getPasswordAuthentication() {
+                return new PasswordAuthentication(mailConfiguration.getUsername(), mailConfiguration.getPassword());
+            }
+          });
+
+        try {
+
+            Message message = new MimeMessage(session);
+            message.setFrom(new InternetAddress(mailConfiguration.getFromAddress()));
+            message.setRecipients(Message.RecipientType.TO,
+                InternetAddress.parse(toAddress));
+            message.setSubject(subject);
+            message.setText(text);
+
+            Transport.send(message);
+        } catch (MessagingException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}