FreeToastHost System Warning Message sent Wend Oct 16

The following message is on the opening page of the FTH log in. The named member is our VP of Membership and I have confirmed that the email - annbrown333@cogeco.ca is her current and valid email address. Could you please clarify the issue
Thanks
Guy

[Wed, 16 Oct 2019 07:05:05 UTC, FreeToastHost System Warning]

Emails sent to the primary email address [ annbrown333@cogeco.ca ] for Member Ann Brown 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.

The email servers at cogeco.ca are advertising a bad secure certificate.

Cert Hostname DOES NOT VERIFY (mx.cogeco.ca != *.megamailservers.com | DNS:*.megamailservers.com | DNS:megamailservers.com)

What information /correction do I pass along to the member to correct the situation ?

Thanks
Guy

Have her send the information that Brian posted to her email provider.

If she is unable to resolve this, she should get a different email address.