troubleshooting outbound smtp

I have a couple of multifunction printer/scanners.  Until recently, these scanners could scan to email without issue.  Now, no messages are being received.  We use the Office365 exchange service if that helps.  I verified the SMTP service is running on our internal relay.  I ran a telnet test from the SMTP server, and the test mail is queued for delivery.  The message sits in the queue folder for a moment and is gone.  The message is never received.  It does not go to the Badmail folder.  Nothing is being generated in the smtp logs folder.  I've tried sending a test message to my domain email account, and an external account.  Neither receive a message.  Appreciate any help from here.
AxISQSAsked:
Who is Participating?
 
Gareth GudgerConnect With a Mentor Commented:
How large are the messages that the scanner is creating? Have you tried lowering the DPI of the scan, or, switching to black and white? Just to see if a smaller attachment can get through.

Anything change with the account your SMTP service is using for authentication? This account needs to be a Global Administrator. Any password changes, or, expirations?
0
 
AxISQSAuthor Commented:
Sorry.  I was wrong.  The SMTP test message does make it to an external (Hotmail) account.  The message is not received by the internal Exchange account.  Would this point to the Office365 service being the problem?
0
 
AxISQSAuthor Commented:
i ended up reconfiguring our scanners to use our MX record as the host on port 25.  Once I did that, we started receiving emails from the scanners.  Not sure why our SMTP server wouldn't work, but this is an acceptable workaround.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.