A very small city uses a service company for email who actually specializes in web pages. While the same company provides email service for the city, they don't profess to really be email specialists. The city is planning to change email providers.
One of the requirements comes from State law that requires that public information emails, including metadata, be archived.
Some guidance suggests that only Microsoft Exchange 2003 or 2007 formats are acceptable (presently) to the required archive system. So, it appears the city will want to be using Microsoft Exchange-based email services.
It's not going to be hosted in-house.
Microsoft's Exchange Online Plan 2 has been recommended at $84/year/mailbox.
It seems to me that there may be other adequate providers for less money. Might you recommend any or comment in general?