iCloud email is being rejected

Hello,

I've been a Toastmaster for over a year now but for some reason, my iCloud email has been rejected. I signed into admin and saw this message:

Emails sent to the primary email address [ lese1030@icloud.com ] for Member Chalese Gilmore, IP4, DL1 have bounced too many times and exceeded the FreeToastHost limit for bounces.
This automatically generated message is to notify you that this email address ***has been removed*** from the FreeToastHost database to prevent it from causing further bounces.
Repeatedly attempting to send emails to invalid, non-working email addresses hurts the overall email reputation of the FreeToastHost system and will not be tolerated.
Please ensure that valid, functioning email addresses are in use to prevent further actions of this nature in the future.
If you have any questions about this warning, please visit support.toastmastersclubs.org

This has been the case for all three clubs that I belong to. Do I need to change my email address to a gmail account. I add toastmasters.org to my safe list and I've never had any issues until these last couple of weeks.
Thanks for your help!
Chalese

This looks like it is something on Apple's end:

Once we are over 3 bounces for an email address, it is "bounced out" and we will not send to it again. We can clear the log for this, but you need to first address the issue on Apple's end. Look at: support.apple.com/en-us/HT204137