InvalidSenderError: Unauthorized sender. Send email form support@mydomain.com

Question

First of all: I have read the other questions with similar title, but this question is slightly different.

I am having trouble trying to use my own email (support@mydomain.com) to send email from appengine. I know that I have to register the email address as an Owner or Developer in App Engine -> Administration -> Permissions, but it is not possible to register support@mydomain.com. I have also tried to register a new google account with this email, but the mail that is added to Permissions is mydomain@gmail.com...

https://developers.google.com/appengine/docs/python/mail/#Python_Sending_mail

I've read the grey note in the link above, but I was wondering if there was any workaround. The only thing I want to do is to send emails, and I do not want to register my domain at Google and pay for it.

Do you have any suggestions? Is it possible?

Answer 1

For abuse-avoidance reasons, App Engine only allows sending email from an authorized address. There is a workaround in that you can set reply_to property of mail message which will make it appear to the recipient as if that address sent it when they reply.

A more cumbersome way is to register a full blown google apps for that domain and then set that address as the sender, but it's really a heap of trouble.