Differences between Pro and Community
| Feature | Pro | Community |
|---|---|---|
| Commercial Support | yes | no |
| Mailman/Mailing Lists | yes | no |
| Autoresponders | yes | no |
| Postfix | yes | yes |
| Greylisting | yes | yes |
| POP3/IMAP | yes | yes |
| unlimited domains | yes | yes |
| Sender Policy Framework (SPF) | yes | yes |
| per-user filtering | yes | yes |
| per-domain policy rules | yes | yes |
| ClamAV virus Filtering | yes | yes |
| Spamassassin Spam Filtering | yes | yes |