Yes.However you can use online extract tools,like webmover.
Here is one for your convenience.
I am not liable for any damages caused by the attachment below.
webmover.php
I asked support,as you can see the 1st picture.,MX record in my hosting provider is not working
Support tell me to use mx.byethost.com.
BTW I mean the quota of webmail(roundcubemail) in free hosting.
I received an 1kb email(for test use),and it use 3% quota.
and it seems if you want to receive emails,set your mx record to mx.byet.org NOT your hosting provider's mx record.