I'm fairly savvy with civicrm in general but bounce processing seems to always stump me. Trying to use Google Apps for the return channel, I saw this post on the wiki: Step-by-step+Return+Channel+on+Drupal+-+Google+Apps+-+CentOS, which is referenced here: CiviMail+Installation.
Is this still the best practice to get the return channel to work? If so, I'm confused by the reference to email@example.com. If the organization sends from firstname.lastname@example.org can't one simply use the email@example.com as the return channel or does this example expect the sending address to be firstname.lastname@example.org?
The return address does not change at all if I enable/disable VERP setting in civicrm mail component settings. I have used return+ in the "localpart" and have Return Path blank. I assume that it is automatically generated.
Also, the wiki says that there are "There are four possible solutions for handling of the return channel." but lists only 2. Furthermore it says " Second, some SMTP services (notably google) insert their own Return-Path address headers, superseding the headers set by civiMail and effectively disabling bounce tracking." Does that refer to "Gmail" or "Google Apps"? When using an outlook client, it does let me change the Reply to address.
I'm using IMAP and after executing the bounce processing job manually I see the mail moved to "label:inbox-civimail-ignored".
Any delicious google app recipes or updates to the wiki appreciated.
BTW - I've had similar problems with SMTP bounce processing using Mandril so I'm sure I'm doing something dumb,