You are probably reading this to try and troubleshoot SMTP Authentication on the Dell 3115 printer. Most email services these days require SMTP Auth. Great, Dell supports that. Or does it? In a bit of ‘wisdom’ the authors strip the @mydomain.com from the username field. Thus, if you were trying to do [email protected], it only sends ‘dellprinter’ as the smtp auth username not [email protected]
Your only choices are to find an open relay (some ISPs allow this for IPs in their network) or find a POP before SMTP authenticating domain.
I ended up leaving email scanning altogether and use FTP to a local file server (BuffaloTech NAS) and then retrieve it via SMB.