I sent a message to the listserv group Friday (a few weeks ago). I received a message from the software saying it had successfully been delivered; however, several of those people did NOT receive the message, including my own personal email account. Last week: Despite a message telling me that the message had been successfully delivered on Friday, I sent individual messages to each person on the listserv and they DID NOT GET THE MESSAGE. Also, at least ten of them told me they have NEVER received a message, at all! I have read manuals on the site but cannot figure out as to how I should approach this problems. I would appreciate any help and tips possible. Thank you.