Member email address invalid for agenda emails

Hello

One of our members is unable to receive agenda emails (simple emails via form are fine).  The VPE receives an error about an invalid/non-working email address.
The email address is fine.  I noticed you have recently fixed similar issues that were caused by spam blocking.
Could you investigate?Club number # 6728388
email: dddouglas "at" optusnet.com.au

Thanks in advance

make sure they add server@toastmastersclubs.org and agenda@toastmastersclubs.org to their contact and server safe list.