I have a problem with one of my customers. An applicationserver (192.168.1.16) is sending e-mailmessages to people of the company when the application receives a new order. These e-mails are put into the junk folder of outlook. Outlook displays the following message: The message is put into the junk folder other than the outlook-filter for spam-mail. This message is translated freely from Dutch.
But the strange thing is that there isn't any spamfilter active. All the clients use trend micro WFB, but this doesn't scan e-mailmessages. I have checked the logs from the exchange and I think that the application isn't authenticating itself with the e-mailserver and just sending mail as email@example.com to firstname.lastname@example.org
I have no idea why the e-mails are being put into to junk. The only thing I could think of is because the application doesn't authenticate itself, the sender remains "email@example.com" and isn't translated to the user "info" in the active directory. When I check the logs on the exchange server, the sender address remains "firstname.lastname@example.org"..
But then the questions remains, which filter is putting the messages into the junk? I have set the exchange up so that it accepts e-mails from the IP-address of the application-server. Maybe the SCL-filter is putting it into the junk? I have set it up to move emails with an SCL higher than 9 to the junk (can't disable it?!)
I hope someone can help me come to the right solution! Thanks in advance!