What are the limitations to eM Client on the free version?


Allows of maximum of two account: http://www.emclient.com/pro-vs-free

Is there a limitation on the total number of email that it can handle or mailbox sizeā€¦ would like to use to get my 4000 emails off the email server as I am shutting down the current email provider and switching to new provider and need to keep all my emails.

No, there are no limitations on number of emails.