(06-12-2018, 12:40 AM)Boba TC Wrote: unfortunately, the 'unhappy' SMTP server and the GUI belong to the Google Inc.
I seriously doubt that Google would create something that is not RFC compliant, let alone *require* unfolded headers. I've used Indy to sent plenty of emails via SMTP to GMail and it has always worked fine, folded headers and all. Something else is likely going on.