I'm having trouble configuring Postfix to deliver e-mail via relay to Sendgrid.
I get the following error: "Unauthenticated senders not allowed"
I'm having trouble configuring Postfix to deliver e-mail via relay to Sendgrid.
I get the following error: "Unauthenticated senders not allowed"
Looks like it was the SASL config within Postfix authenticating to Sendgrid. We were able to use the following: