The downside is that it will take longer to multi part mime messages, since you're creating two different distinctions.

Check and clean your air conditioning filter regularly. Tell your potential subscribers what form of content are typically your next issue.

And in the grand scheme of things, the worst they know is "no." If they do, your are no worse off than you are right right away.
These start-up fees may be called many things and wish to be told they have or are recommended purchases for training, computer services and product inventory.