maybe something like this will work - 1) add a REPLY_TO address to each email sent, for eg - donotre...@yourdomain.com 2) foward all mails received at donotre...@yourdomain.com to boun...@yourappid.appspotmail.com 3) receive incoming mails at boun...@yourappid.appspotmail.com and check the subject like and body for strings like Delivery failed error etc (you can try this out with some bad emails bouncing back) and hence remove the email address from your mailing list
cheers ! -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.