After Ubercart checkout submitting order, I get this error:
Unable to send email. Contact the site administrator if the problem persists.
I am using the SMTP Authentication Support module, I configured it correctly. Test mails work. So the error lies probably within Ubercart.
/admin/reports/dblog, I get this interesting error log:
it tries to send the mail to the sender mail? Very weird!
How to get this resolved?