That would be "NDRs", right? A 554 is invalid command arguments. Are you sure it's your Exchange Server issuing the NDRs or do you have anything filtering your SMTP before it gets to Exchange? Time to look into protocol logging if it's your Exchange Server doing the bouncing.
Ed Crowley MCSE+Internet MVP kcCC+I Tech Consultant hp Services Protecting the world from PSTs and Bricked Backups! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of [EMAIL PROTECTED] Sent: Friday, May 31, 2002 9:28 AM To: Exchange Discussions Subject: 554 Some external clients/customers are getting DNR's when sending email to us saying "Invalid Data 554". I have searched Technet and beyond... Anyone have an idea how to resolve this? Thanks! _________________________________________________________________ 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]
