Is the Flexmls Portal the same thing as a subscription?

No. While subscription emails are also based on saved searches, automatic email messages include only listings that were recently updated or are new search results. The Flexmls Portal shows your client all of the current results for the searches that you have created for them. However, the Flexmls Portal and subscription emails do work together. When a client with access to the portal clicks a link in a subscription email, the portal opens automatically.