Side by side
Postfix vs SmarterMail
Both stand on mail server software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacSelf-hosted
Visit Postfix 
Free plan AndroidiPhoneLinux+3
Visit SmarterMail The facts
| Postfix | SmarterMail | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Self-hosted | Android, iPhone, Linux, Self-hosted, Web, Windows |
| Lowest paid plan | Not published | SmarterMail Professional (50 mailboxes): $500 a year |
| Plans published | None | 5 |
| Maker | Not published | Not published |
| Website | postfix.org | smartertools.com |
| On mail server software | #24 of 34 | #20 of 34 |
Alternatives to Postfix Alternatives to SmarterMail The whole list