Side by side
KPN Mail vs Postwix
Both stand on personal email services. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidiPhoneMac+2
KPN Mail provides cross-device email access with custom-address options, inbox combining, and spam filtering. Its IMAP recommendation and post-cancellation restrictions matter when planning device use or ending KPN service.
Visit KPN Mail Free plan APIWeb
Postwix combines browser email, external inbox access, aliases, and developer API features. Its free tier covers core webmail, while the Unlimited plan adds more storage and broader mailbox features for a monthly fee.
Visit PostwixThe facts
| KPN Mail | Postwix | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Mac, Web, Windows | API, Web |
| Lowest paid plan | E-mail Only: €999 a month | Unlimited: $5 a month |
| Plans published | 2 | 2 |
| Maker | KPN Mail | Not published |
| Website | kpn.com | postwix.com |
| On personal email services | #74 of 115 | #78 of 115 |
KPN Mail: what it does well
- Works across web, desktop, and mobile
- Supports custom domains and aliases
- Combines other inboxes in Webmail
- CalDAV and CardDAV calendar support
- Free plan includes six email accounts
What to know first
- POP3 permits only one device
- Paid retention plan costs €7.75 monthly
- Post-cancellation changes are unavailable
- Email remains active six months after cancellation
Postwix: what it does well
- Browser inbox works across devices
- External mailbox sync is available
- REST API exposes folders, messages, and search
- Ad-free inbox with stated encryption
- Free plan billed forever
What to know first
- Free plan includes 1 GB storage
- Unlimited costs $5 a month after trial period
- DKIM, SPF, and DMARC require configuration
Alternatives to KPN Mail Alternatives to Postwix The whole list