| Feature |
Pro |
Plus |
Freeware |
| Runs as Windows NT/2000/XP Service |
Yes |
Yes |
No |
| Unlimited Accounts |
Yes |
Yes |
Yes |
| IMAP |
Optional Additional $49.00 |
No |
No |
| Support of Multiple Domains |
Yes |
Yes |
Yes |
| Different Accounts with Same Name for Different Domains |
Yes |
No |
No |
| SMTP Authentication |
Yes |
Yes |
Yes |
| POP before SMTP |
Yes |
No |
No |
| Password Protected Administration Mode |
Yes |
Yes |
No |
| Web Interface |
Yes |
Yes |
Yes - adware |
| Customization of Web Interface |
Yes - possible, by domain |
Yes |
N/A |
| Domain Administration via Web Interface |
Yes |
No |
No |
| Distribution Lists |
Yes |
Yes |
No |
| Built-In Mailing List Server |
Yes |
No |
No |
| Autoresponders |
Yes |
Yes |
No |
| Basic Filters |
Yes |
Yes |
No |
| Unlimited Message Size |
Yes |
Yes |
No |
| IP Homes |
Multiple |
One |
None |
| WAP Interface |
Yes |
No |
No |
| Filtering of mail according to IP addresses |
Yes |
No |
No |
| Trusted IP Addresses |
Yes |
No |
No |
| Disallowed IP Addresses |
Yes |
No |
No |
| ORDB support |
Yes |
No |
No |
| MAPS support |
Yes |
No |
No |
| Server Extensions |
Yes |
No |
No |
| Verification of Addresses of Senders |
Yes |
No |
No |
| Additional Utilities for Domain Verification |
Yes |
No |
No |
| "Mailbag" Domains (Domain Relay) |
Yes |
No |
No |
| Secondary SMTP Port |
Yes |
No |
No |
| WhiteLists |
Yes |
No |
No |
| Price, US$ |
88 |
49 |
Free |