Do you think would be an answer for the problem (in sql 2008) where, using database mail to send email and attachments when logged on to sql with sql authentication, won't allow sending the attachment unless one has sysadmin permission?

Here is the books online discussion:

Database Mail uses the Microsoft Windows security context of the current user to control access to files. Therefore, users who are authenticated with SQL Server Authentication cannot attach files using @file_attachments. Windows does not allow SQL Server to provide credentials from a remote computer to another remote computer. Therefore, Database Mail may not be able to attach files from a network share in cases where the command is run from a computer other than the computer that SQL Server runs on.

Have been googling this for days. No one seems to have solution for this problem other than to use windows authentication or give user greater permission, neither of which, is desirable. thanks for any thoughts on this.