Email to members-xxxx@toastmastersclubs.org silently failing

Hi,

I've sent a few emails over the last several days to members-1173@toastmastersclubs.org (which has been working magnificently until recently).  I have a sent from GMail using a couple of email addresses in the membership list and they behave the same.  Google shows me that I sent the message, but I don't get an email or a bounce of any kind and no other members apparently are getting the email.  No errors indicated and nothing in the Spam folder.
Any suggestions about what to try next?

Thanks for your help!
Jim K.

I can see you sending the the officers email officers-1227778 and officers-1173
Make sure you don't have a spelling mistake for the members email list

Hi Brian,

It looks like I had a user error on my side.  Somehow, Gmail created a contact of the form members-xxxx@toastmastersclubs.org  that mapped into a different email address.  I deleted that contact and I think we're all good now.
Thanks for your help.  You not seeing it at all gave me a clue .

Best regards,
Jim K.