#18: implement SMTP Submission (587/465), SASL PLAIN/LOGIN auth and preflight diagnostics

services/protocols/internal/application/port/outbound_repository.go

@@ -2,6 +2,9 @@ package port
 
 import (
 	"context"
+	"time"
+
+	"github.com/google/uuid"
 
 	"lambdamail/protocols/internal/domain/entity"
 )
@@ -10,4 +13,9 @@ type OutboundRepository interface {
 	Enqueue(ctx context.Context, job *entity.OutboundJob) error
 	FetchNextReady(ctx context.Context, workerID string, limit int) ([]*entity.OutboundJob, error)
 	UpdateJob(ctx context.Context, job *entity.OutboundJob) error
+
+	// CountRecipientsSince reports how many recipients a mailbox has queued
+	// since a point in time. It backs the per-mailbox send limit that keeps a
+	// compromised account from becoming a spam source (PLAN.md section 5.2).
+	CountRecipientsSince(ctx context.Context, mailboxID uuid.UUID, since time.Time) (int, error)
 }