We are using Scan to Email utilising an office 365 connector. The configuration works for the test configuration, and the email comes through almost instantly.
When we do a Scan to Email on the machine however, it very rarely works (but does sometimes)
The following has been checked: IP address of Printer is DHCP with reservation and no conflicts on network (have tested static to no change) DNS servers are specified and working (included 188.8.131.52 as a test to no change) SMTP server has been specified correctly (tried both hostname of COMPANY-co-uk.mail.protection.outlook.com and IP address) Port 25 SMTP authentication is "none" for both user jobs and system jobs (as it uses a connector and not a live user account).
Encryption STARTTLS (if available)
File size 20480/Fragments 1/Total job 2000000 we have experimented with this to no effect.
Firewall has been opened to allow all outgoing traffic from printer (as a test, not going to be permanent)
Tested on admin user as well as guest
After sitting on processing for about 5 minutes it chucks out a report which says: Job Status: FAILED Failure transferring job to network server