emailing AR statements

Has anyone had any issues with being "black listed" by your email provider/server for emailing AR statements, invoices, etc... from the Sage program's email capability?

My IT people are concerned because we are one division (using only Sage) of a larger organization.

They are concerned we may create a problem.

We will probably only email 25-50 statements once a month for now.

However, if we are successful at perfecting the process, i hope to have all statements sent this way.  We currently have about 300 active accounts.