Emails bouncing

I am admin for club numbers #3822605 and #5236130.

Bigpond.net, .com, .net.au and .com.au is a major Australian ISP.

For all our members and past members with bigpond addresses I am getting a message like this:

Your email message to ????@bigpond.com could not be delivered
and was returned to the FreeToastHost server. Details are as follows:

Recipient Email Address: ????@bigpond.com
Email Subject: [TM - KBay] Keppel Bay Toastmasters meeting on line during the
Date Sent: Tue, 31 Mar 2020 04:44:41 +0000

Diagnostic Code: 554 5.5.4 Amazon EC2 not allowed. Please email postmaster@bigpond.com and provided the IP address of your instance for whitelisting. IB107
Delivery Status: 5.5.0
Date Last Attempted: Tue, 31 Mar 2020 04:44:43 GMT

I will email them, but is there anything you can do?

The same message is going to other addresses, including @gmail.com and @live.com
John Sleigh

John, I've been chasing the bigpond issue with their tech support for a few days - we have had the issue partially resolved, just waiting for it to ripple through.

gmail.com and live.com wouldn't be getting the bigpond error message, that would be a separate issue.

Bigpond emails are working again.
You might need to re-enter email addresses in Membership Management for some of your bigpond members

My email has also been removed due to email bouncing. Please reinstate me to the following club sites.

Long Beach Gavel Toastmasters Club #11
lbgavelclub.toastmastersclubs.org/
The Officers' Club of District ONE #1641204
officersclub.toastmastersclubs.org/

The Bounce Count for Email Address [rcotacat@gmail.com] has been reset to zero.