package smtp const ( AuthFailed = "Authentication failed for user: %s" DeliveryFailed = "Failed to deliver to %s: %v" DeliverySuccess = "Delivered to local mailbox: %s" InvalidCredentials = "Invalid credentials." ListenFailed = "Failed to start %s listener: %v" MailFrom = "Mail from: %s" MXLookupFailed = "MX lookup failed for %s: %v" MessageParseFailed = "Failed to parse incoming message: %v" MessageReceived = "Message received (%d bytes) from %s to %v." MessageStoreFailed = "Failed to store message: %v" NoLocalRecipients = "No local recipients found for message from %s." Recipient = "Recipient: %s" RecipientNotLocal = "Recipient %s is not a local mailbox." ServerStarting = "%s listener started on %s." SessionStarted = "New session from %s." ShutdownComplete = "All listeners stopped." ShutdownFailed = "Failed to shutdown %s listener: %v" TLSCertLoadFailed = "Failed to load TLS certificate: %v" UnknownRecipientDomain = "No MX records found for recipient domain %s." )