The best way to try to figure this one out is to enable protocol logging. I suspect what's happening is that you're communicating with an e-mail server that's advertising protocol capabilities that it doesn't support. In short, this is almost certainly the other domain's problem.
An example of this would be an IIS SMTP server in front of an Exchange 5.5 server. Unless you set a registry key, the IIS SMTP server will advertise that 8bitmime is supported, but the Exchange 5.5 server will reject it because it's unsupported there. Ed Crowley MCSE+Internet MVP kcCC+I Tech Consultant Compaq Computer Corporation Protecting the world from PSTs and Bricked Backups! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Matt Plahtinsky Sent: Wednesday, February 06, 2002 12:34 PM To: Exchange Discussions Subject: SMTP Error Hi Everyone. I am new to exchange and I have come across an error that is stumping me, which being new to exchange it doesn't take much. I am running Exchange 2000. There is one domain that I get and undeliverable message when I try to send mail to it. I can send mail to that domain several other ways. The Undeliverable message is an (5.5.0 smtp ;500 Syntax error, command unrecognized). Any tips or places where I can start to trouble shoot this would really be appreciated. Thanks Matt Plahtinsky _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
