It was almost certainly something very simple. Look at the time stamp. By any chance was their mail server off-line for a few minutes for an end of the day service activity?
-----Original Message----- From: Exchange Server [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 25, 2002 12:13 PM To: Exchange Discussions Subject: Weird NDR I am having a weird problem. I have users in my company that can send email just fine to a particular email address. But I have other users that get the following NDR when they send to the same address. This is a single Exchange2K server, sp2. Everyone is configured the same. Any ideas? Your message did not reach some or all of the intended recipients. Subject: test Sent: 6/24/2002 5:05 PM The following recipient(s) could not be reached: '[EMAIL PROTECTED]' on 6/24/2002 5:05 PM There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <gipper.TelPro1.com #5.5.0 smtp;553 Authentication is required to send mail as <[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] _________________________________________________________________ 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]
