Fast deployment You can have full-featured mailserver installed in couple minutes mostly waiting until script get job done. Whole package was designed with sane defaults to start quickly without knowing internals and without doing decisions which can break e-mail system.

Data has its own volume User data and configuration is strictly separated from binaries. User database is stored in SQLite database - in file. Therefore Poste.io can be fully used with external storages. Migration, backups or updates are therefore very easy and mostly consist of files manipulation.