initial public commit

tools/mailer/mailer.go

@@ -0,0 +1,18 @@
+package mailer
+
+import (
+	"io"
+	"net/mail"
+)
+
+// Mailer defines a base mail client interface.
+type Mailer interface {
+	// Send sends an email with HTML body to the specified recipient.
+	Send(
+		fromEmail mail.Address,
+		toEmail mail.Address,
+		subject string,
+		htmlBody string,
+		attachments map[string]io.Reader,
+	) error
+}