Our environment runs exchange 2010. Recently we have found that we are unable to set up SMTP on devices (scan to email on copiers, email notifications on various things). Details are entered in correctly at the device but the test always fails with a generic error (unable to send email) etc.
Some other devices on the same network seem to be able to send SMTP notifications without issue (e.g. our UPS). If I copy the exact SMTP details in a device that isn't working, to one that is. The email sends, indicating to me that the actual settings are ok?
The only reason I can think of to cause this would be that some devices require something additional that our Exchange Server doesn't have configured?
We have no known issues with our Exchange server. I've had a look at "Receive Connectors" in Exchange, and tried adding in a new receive connector for the IP address of a device that isn't working, but it doesn't seem to solve the issue.
What should I be looking at to ensure that all devices within our network can communicate via SMTP?
I have tried testing SMTP using a few tools, using "bmail" from here: http://retired.beyondlogic.org/solutions/cmdlinemail/cmdlinemail.htm
I can successfully send an email from any made up address to a valid address in our organisation using the below example command:
C:\> bmail -s MyServer -t firstname.lastname@example.org -f email@example.com -b "This is a test" -h -a "This is the subject"
Using TELNET and …