One of our clients could not send the email to us. the error message they got is" there was a SMTP communication problem with the recipient's email server. Please contact your system administrator.<xxx.com #5.5.0 smtp;571 delivery not authorized, message refused> Both of us use Exchange 2003. And also I edit the anti-spam program to allow this domain email address to pass through. Is anyone here to help me to fix this issue? Thanks in advance
Your mail server seems to be refusing the connection from the other side. Are you using the IMF? Are you using realtime blacklist providers? If so - make sure that the sender's domain is not listed. Also - turn up protocol logging on SMTP - to see if there is more happening that you are not aware of. One more possibility, do you run any type of AV/AS from third party vendors that might be intercepting mail and processing it prior to Exchange being involved? (i.e. Trend Micro Messaging Security, McAfee GroupSheild, Symantec Mail Security, etc.) -- Chris S MCSE, MCITP:Messaging, CISSP "Michael" wrote: > One of our clients could not send the email to us. the error message they got > is" there was a SMTP communication problem with the recipient's email server. > Please contact your system administrator.<xxx.com #5.5.0 smtp;571 delivery > not authorized, message refused> > > Both of us use Exchange 2003. And also I edit the anti-spam program to allow > this domain email address to pass through. > > Is anyone here to help me to fix this issue? > > Thanks in advance
Thanks for your help. It's fixed. "Christopher Smith" wrote: > Your mail server seems to be refusing the connection from the other side. > Are you using the IMF? Are you using realtime blacklist providers? If so - > make sure that the sender's domain is not listed. Also - turn up protocol > logging on SMTP - to see if there is more happening that you are not aware of. > > One more possibility, do you run any type of AV/AS from third party vendors > that might be intercepting mail and processing it prior to Exchange being > involved? (i.e. Trend Micro Messaging Security, McAfee GroupSheild, Symantec > Mail Security, etc.) > -- > Chris S > MCSE, MCITP:Messaging, CISSP > > > "Michael" wrote: > > > One of our clients could not send the email to us. the error message they got > > is" there was a SMTP communication problem with the recipient's email server. > > Please contact your system administrator.<xxx.com #5.5.0 smtp;571 delivery > > not authorized, message refused> > > > > Both of us use Exchange 2003. And also I edit the anti-spam program to allow > > this domain email address to pass through. > > > > Is anyone here to help me to fix this issue? > > > > Thanks in advance
