On Thu, Apr 3, 2008 at 3:00 AM, Jason J. W. Williams <[EMAIL PROTECTED]> wrote: > Does anyone have a good contact number for the Hotmail NOC? We've got > e-mails from Hotmail to some of our customers being returned the Hotmail > sender with a 554 error message fairly regularly. Our logs aren't showing > any rejections, so we need to talk to Hotmail and find out what the 554 > means on their side (there's no error description). Any help is greatly > appreciated.
Easier if you paste a sample bounce And check if you have some kind of smtp capable firewall device (like a barracuda) or maybe an outsourced filtering provider that's filtering this lot before it reaches your mailserver. srs