bugfixes; email parsing; send emails into matrix rooms; e2e tests

smtp/smtp.go

@@ -9,5 +9,5 @@ import (
 // Client interface to send emails
 type Client interface {
 	GetMappings(context.Context) (map[string]id.RoomID, error)
-	Send(from, to, subject, body string) error
+	Send(from, mailbox, subject, body string) error
 }