duplicate emails

Midway Toastmasters club 383
 
Hello,

I'm seeing an issue where emails sent to our club member and guest email lists ("members-383@" and "guests-383@") show up twice in recipient email inboxes (two duplicate copies). This just started happening around 1 month ago. I've seen it happen with multiple different email senders, so I don't think it's just a personal email issue. 

Do you have any advice on how to resolve this issue? Are there any FreeToastHost settings that might cause this?

Also sorry for reposting this, but nobody responded the first time I posted this question here.

Thanks,
Bryan Brudevold 
VP PR
 

Are you mailing the Members and Guests in separate emails or both in the same email.