Damiano
James brings up a good point .. if you are in a corporate setting and are trying to send out SMTP thru the Corporate infrastructure .. I know for a fact, that many Corporate IT policies forbid SMTP traffic out or within their Corporate routers and block that type of traffic.... without prior permission and exceptions made in their router for that particular machine name.
If that is the case and your customer is in a Corporate setting .. I would find out if that Company has specific policies in place to block SMTP traffic within their infrastructure.
Rick Lipkin
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