Our customers want to send emails from our java appengine application using their email accounts, with their smtp servers. Is that possible? Verifying all their email addresses in appengine is NOT an option. Would it be possible to send email from an appengine application using an external SMTP server?
Thank you very much.
No, there’s no way for an App Engine app to make a connection to an external SMTP server. If you want to do this, you’ll need to find or build a webservice that sends email via an HTTP-based interface.