I cannot find preferences in my Quickbooks.  I've looked in Edit and other sections but cannot find it.  So here I am with a 2020 Mac desktop, 2020 QBs with a current Outlook for my email.  Up until November 2020 I had no problem sending my invoice.  Come Dec. and now Jan. cannot send.  It shows QuickBooks is having problem with your email program.  Check to see if I can send and receive regular emails, which I can but can't find the problem

thanks,