I'm not receiving any emails from which have sender welkom@adempauze.be, gert@qbs.be, and info@desert-soul.be

This is the error that the SMTP-server is receiving for these mailboxes:

[2024.04.28] 15:49:24.540 [52370819] RSP: 421 4.7.0 [TSS04] Messages from 185.41.125.155 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes

How can this be solvend?

Thanks!

Kind regards,
Gert De Ceuster