Hi NonprofitGlen and misioneraquica,
Welcome to the forum.
I know how important it is for the both of you to be able to deliver out emails and you can rest assured that we'll do our best to help.
First, just to verify the issue, are you also being prompted by the system that a specific email address which is included in the group has an incorrect format? If yes, kindly provide us the email address that is being marked
as invalid and a screenshot of the error in the private message that I've created for you.
It is possible that one of the email addresses in your group is no longer active which is why you
cannot send an email.
Just click on "You have a private reply to this message" link just above your post to view the message. You have to be signed into this website in order to see the Private Message tab and we also need
you to reply back to this post if you've already provided the information in there.
We'll await your response.
Thank you.