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Prepend Return-Path header when receiving email

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nemunaire 2025-10-22 12:27:22 +07:00
commit fdb43533cd
1 changed files with 4 additions and 0 deletions
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4
internal/lmtp/server.go
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@ -92,6 +92,10 @@ func (s *Session) Data(r io.Reader) error {
log.Printf("LMTP: Received %d bytes", len(emailData)) log.Printf("LMTP: Received %d bytes", len(emailData))
// Prepend Return-Path header from envelope sender
returnPath := fmt.Sprintf("Return-Path: <%s>\r\n", s.from)
emailData = append([]byte(returnPath), emailData...)
// Process email for each recipient // Process email for each recipient
// LMTP requires per-recipient status, but go-smtp handles this internally // LMTP requires per-recipient status, but go-smtp handles this internally
for _, recipient := range s.recipients { for _, recipient := range s.recipients {