M127 LaserJetPro successfully prints from every email except the gmail address the account is registered to. Email from others show up in the collections list, but nothing from the gmail account.
The printer is set to "open to anyone" in device settings, and if I switch to "Allowed senders only," the gmail account shows up in the allowed list.
I have triple-check for the correct printer email address, I have made sure to send plain text with no signature or attachment, but still noting.
Any ideas what to check next?