From address. The sender address must be one of the following types:sup...@example.com. Domain accounts are accounts outside of the Google domain with email addresses that do not end in @gmail.com or @APP-ID.appspotmail.com.To send an email from an existing domain account, add the domain account as a Developer to your application using the Administration Console. The account is then sent an email with an invite to develop the application, which you must accept to add the account to the application. It is possible that when you send emails from a domain account using Google servers, automated spam classifiers might believe the email address is being spoofed. If you run into this issue, set the SPF records for the domain to indicate that Google is a trusted source for your email. For instructions on how to do this, see SPF records in the Google Apps help articles.
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