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: 1582 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 08:56:50 +0100 from [165.154.252.200] ----- Transcript of session follows ----- ... Deferred: Connection timed out with baijuenergy.com.cn.w.cdngslb.com. ... while talking to mx-apac.mail.gm0.yahoodns.net.: >>> MAIL From: SIZE=3145 ... Deferred: 421 4.7.0 [TSS04] Messages from 83.138.65.30 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes ... while talking to mx-tw.mail.gm0.yahoodns.net.: >>> MAIL From: SIZE=3145 ... Deferred: 421 4.7.0 [TSS04] Messages from 83.138.65.30 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes ... Deferred: Connection timed out with winsun.pv.cn. Warning: message still undelivered after 4 hours Will keep trying until message is 1 day old