Single email to guests@ has been sent out 10x now! It won't stop sending it out!

Yes, the email included one attachment — a blank Toastmasters membership application form.Initially, I tried sending the email to both mailing lists together:

• prospects-643436@toastmastersclubs.org
• members-643436@toastmastersclubs.org

The first attempt used both lists in the “To” field, and the second attempt used both lists in “CC,” but both attempts appeared to fail to send.After that, I sent separate emails to each group individually, and those appeared to send successfully.However, I later noticed that only the prospects group seems to be repeatedly receiving the same email. The members group does not appear to be affected. Some prospects reported receiving more than 20 duplicate emails.

FTH has never supported emailing more than one list at a time.

Interesting, I sent many times before without any problem. Please see screenshots. 

Is there a possibility this might happen again? When our club had this issue, we only had the single guests@ in the TO field and nobody in the CC or BCC fields.

We will be sending an email to our guests for our upcoming meeting next week, so we want to make sure it doesn't happen again.

If you're not sure of the best solution, perhaps at least decrease the number of resends that it can do so people only get one extra email instead of 10.

Thank you

We are pretty sure we found the issue, please try and email your guests again. Just don't send them your Agenda with your members name on it.