Email bounce

Hi,
Some weeks ago you fixed this problem but unfortunately it is happening again.
Will you pleas do what you can to accept this valid email address and advise what we can do to avoid it bouncing again. 

[Tue, 26 Mar 2024 06:21:09 UTC, FreeToastHost System Warning]

Emails sent to the email address [ sally@cedesign.net.au ] have bounced too many times and exceeded the FreeToastHost limit for returned emails.  The error information for the last bounced email is as follows:

Your email message to sally@cedesign.net.au could not be delivered
and was returned to the FreeToastHost server. Details are as follows:

    Recipient Email Address: sally@cedesign.net.au
    Email Subject: 27-03-2024 Meeting Notification: Role Change / Sandbelt Toastmasters
    Date Sent: Tue, 26 Mar 2024 06:21:03 +0000

    Diagnostic Code: 550 5.7.0 bad DKIM signature data
    Delivery Status: 5.7.0 securityerror
    Date Last Attempted: Tue, 26 Mar 2024 06:21:05 GMT
Thanks and regards,
George Randall
IT Support and Admin.
Sandbelt Toastmasters club number 1634

Georan post=92385 userid=21153and advise what we can do to avoid it bouncing again. 

She needs to resolve the issue listed in the bounce message which is standard email protocols and nothing specific to FTH. Since it's a custom domain her provider may be able advise what to do.

Sorry, since it's been so soon since the previous bounce reset I need to leave that to Brian to address.

if will take some time for us to look into this further. bounce count has been reset.

In the mean-time get her to whitelist  @toastmastersclubs.org (it might be worth asking her email provider to do that too)
See how to do so here:  support.toastmastersclubs.org/doc/item/e...embers-receive-email