We are unable to send invoices and recieve the attached error. We are using a GMAIL account with the below settings as instructed in the tutorals but keep recieeving an error when trying to send out invoices. We have also tried 2 step verification with an app password, that doesnt work either. we have also created and tried with a yahoo account but that just times out. Does anyone know the corec settings for us to use our gmail account to send out our invoices.
less secure apps enabled in gmail