When sending e-mail from an outside e-mail account I am getting an error message
“Remote host said: 550 5.7.1 Unable to relay for firstname.lastname@example.org
Giving up on 18.104.22.168.”
This was tested and working only a few weeks ago and now it is not working. We are running Exchange 2003. it sits behind an ISA Server and we control the outside DNS for it. I am really at a lose of words for this one. Any help would be great on this.
the only errors in the Exchange error log are as follows.
Failed to generate offline Address Book /dc=com/dc=ecsrefining/cn=Configuration/cn=Services/cn=Microsoft Exchange/cn=ECSRefining/cn=Address Lists Container/cn=Offline Address Lists/cn=ParrishClanUsers, error '80072030'
The database "First Storage Group\Public Folder Store (SC20)" has 7 megabytes of free space after online defragmentation has terminated.
not sure if they are related I am totaly new to exchange. I was recieving the secound error sense I installed it so I am not sure if it means anything because exchange seams to be working fine. all inside Trafic is working great.