Reporting-MTA: dns; forward401a.mail.yandex.net
X-Yandex-Queue-ID: B162FC2566
X-Yandex-Sender: rfc822; operasyon@kaliruturizm.com.tr
Arrival-Date: Tue, 02 Jun 2026 16:38:28 +0300 (MSK)

Final-Recipient: rfc822; info@istanbulsightseeingtours.com
Original-Recipient: rfc822;info@istanbulsightseeingtours.com
Action: failed
Status: 5.0.0
Remote-MTA: dns; rd-spamexperts.guzel.net.tr
Diagnostic-Code: smtp; 550 The sending IP (178.154.239.94) is listed on
    https://spamrl.com as a source of spam.