Warning: could not send message for past 4 hours

From: MAILER-DAEMON@mediaf.han-solo.net
Domain: IP info mediaf.han-solo.net
MX-server: IP info mediaf.han-solo.net
Size: 959 Bytes
Create: 2025-01-28
Update: 2025-01-28
Score: 0
Safe: Yes

********************************************** ** THIS IS A WARNING MESSAGE ONLY ** ** YOU DO NOT NEED TO RESEND YOUR MESSAGE ** ********************************************** The original message was received at Tue, 28 Jan 2025 09:18:59 +0100 from [165.154.252.200] ----- Transcript of session follows ----- ... Deferred: Connection refused by denlight.com.cn. ... while talking to sal-org-sg.mail.protection.outlook.com.: >>> DATA ... Deferred: 451 4.7.500 Server busy. Please try again later from [83.138.65.30]. (AS780082) [HK2PEPF00006FB3.apcprd02.prod.outlook.com 2025-01-28T12:30:47.241Z 08DD3E69F00DA873] Warning: message still undelivered after 4 hours Will keep trying until message is 1 day old