Magic Mailing lists not working outside troop track

for a while last year when i emailed inside troop track there were delays so we got in the habit of using the magic mailing lists in the normal email browser. This week that stopped working. On my end it shows I sent the email. BUT no one is receiving them. I rely on those magic mailing lists to give to my Troop Leaders to email their units information. If it matters I am emailing from a gmail email address. Hoping this will be fixed soon.