550 5.7.1 Client does not have permissions to send as this sender

Problem

When you try to test the Scan to Email Configuration, you get an error message that is similar to the following:

550 5.7.1 Client does not have permissions to send as this sender

Solution

You would need to configure "Send As" permission on your mail server to allow your agent accounts to send email as your outbound mailbox account.

Below are instructions on how to do it in some of the more common email server/providers.

Exchange 2007 &2010
http://technet.microsoft.com/en-us/library/bb676368%28v=exchg.141%29.aspx

Office365:
http://support.microsoft.com/kb/2572646

Google Apps:
https://sites.google.com/a/apu.edu/gmail-for-apu/executive-assistants/send-on-behalf