| Features | Poste.io | Mailu |
| Easy to install | No | Yes |
| Shows Email Server and port | No | Yes |
| Free | Yes | Yes |
| Domain Details | No clue where to find | Yes |
| Outbound spam block | Yes (Paid version only) | Yes (Free) |
| Unlimited Domains | Yes | Yes |
| Unlimited Mailboxes | Yes | Yes |
| More Information | More Information | |
