GreenAnt uses an advanced filtering system based on [sieve](

More details of how to set filters are here

If you have been previously using the old webmail system, you may have some filters that you want to migrate to the new system. Unfortunately, the way in which the two webmail programs work doesn't result in automatic migration of your filters.

Therefore, you'll need to recreate the rules in the new webmail system.

Here's how to do that:

  1. log in to the old webmail at
  2. go to Settings >> Filters
  3. write down your filters, you can also download the filter set for backup.
  4. log in to the new webmail at and edit your new filters.

Please contact us if you have any difficulty with your mail filters.