I have had conversations with 2nd level support at least 3 times, maybe 4. Everyone has offered the same suggestions and I've gone through the motions with the same results. Everything from port 465 vs port 587, DNS, etc.
That is indeed an interesting error. I have many of these under my service and have not see this error. My suggestion to you would be to contact the Xerox Support center at 1-800-821-2797 and speak with second level. They may request the network logs and/or do a network trace.
If someone helped you make sure you give Kudos for their efforts! Don't forget to Select Accept as Solution if the reply resolved your issue as it will be able to help others!
Using SSL, I can't scan more than 2 emails in succession. The third scan will eventually timeout with an error report indicating "Failure transferring job to network server". If I wait about 5 minutes, I can scan 2 more emails in succession but the third scan will timeout again. The machine has the latest software (Xerox tech installed it today).
I also have a Xerox 3635 configured exactly the same and it has no problems scanning several emails in quick succession.
If anyone else has had a similar problem with a WC7556, was it resolved?