1 files changed, 13 insertions, 0 deletions
diff --git a/mailing/mailer.go b/mailing/mailer.go
new file mode 100644
index 0000000..c9ab8d0
--- /dev/null
+++ b/mailing/mailer.go
@@ -0,0 +1,13 @@
+package mailing
+
+import (
+	"github.com/kch42/simpleconf"
+)
+
+// Mailer is a interface that defines the Mail function.
+type Mailer interface {
+	Mail(to, from string, msg []byte) error
+}
+
+// MailerCreator is a function that creates a Mailer instance from config values.
+type MailerCreator func(conf simpleconf.Config) (Mailer, error)