After the last Gmail update, new security measures were included. Here are the steps to activate the emailing feature in Aster billing:
After the last attempt you got an email from gmail in your account titled „Sign-in attempt prevented”. What Gmail needs is for you to manually allow other apps to use your email.
To do this, please log in to your desired gmail address and go here:
After you have done this, you can open Aster billing and send documents via gmail, provided the correct address and password are introduced.