What e-mail client are those 5 running? What are the rest running? When did this start? Has anything changed on those 5? John Tolmachoff Engineer/Consultant/Owner eServices For You > -----Original Message----- > From: Sherry Yochim [mailto:sherry.yochim@xxxxxxxxxxxxxxxxxx] > Sent: Tuesday, December 02, 2003 9:21 AM > To: [ExchangeList] > Subject: [exchangelist] Unable to relay errors > > http://www.MSExchange.org/ > > Some of my clients are getting this error sporadically. Once they get it > the first time they can resend and the message will go through. > > The following recipient(s) could not be reached: > > XXXXXXXXX on 12/2/2003 9:51 AM > You do not have permission to send to this recipient. For > assistance, contact your system administrator. > <exchange1.mccormackbaron.local #5.7.1 smtp;550 5.7.1 Unable > to relay for XXXXXXXXXXX> > > I have the box checked that says to allow all users who authenticate to > relay regardless of the list above on my SMTP Virtual server. > > It seems to be happening with the same 5 clients but not all the time. I > can't find anything helpful on the Knowledge Base. Can you offer any > suggestions? > Thanks. > > ------------------------------------------------------ > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist > Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp > Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ > ------------------------------------------------------ > Other Internet Software Marketing Sites: > Leading Network Software Directory: http://www.serverfiles.com > No.1 ISA Server Resource Site: http://www.isaserver.org > Windows Security Resource Site: http://www.windowsecurity.com/ > Network Security Library: http://www.secinf.net/ > Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com > ------------------------------------------------------