In admin console, under system log, I get an error that reads:
error OTRS-CGI-10 Can't send to 'customer@example.com': 5535.7.1 <helpdesk@mypublic.com>: Sender address rejected: not owned by user otrs@myprivate.com
helpdesk@mypublic.com is being forwarded to otrs@myprivate.com. OTRS is connecting (sometimes

I have tried multiple combinations in SysConfig to fix the disconnect. I cannot find where helpdesk@mypublic.com is being stored. It returns zero search results when searching under SysConfig.
Thanks
Pete
OTRS 3.2.6