InQloud (formerly EverSyncer) follows the same limits that Evernote email gateway specifies for your account. See the original Evernote article here.

• Free account holders may send a maximum of 50 emails per day to their Evernote email address.

• Premium account holders may send a maximum of 250 emails per day to their Evernote email address.

The count is reset for each user daily at 12:00AM Pacific time.

Please keep this in mind when configuring your Gmail filters!
You may want to keep a copy of forwarded emails in a Gmail folder.