allbil

The problem is solved.
Step 3 is not really correct:
“In Sender Email Address enter your account’s email address. This should be the same address you login to Google with.”

This address should be the address you get with the key.

Now there is another problem, Postman shows following error message and it fails to send a test mail:

“Oh, bother! Your test message failed to send 🙁 … Communication Error [334].”