| Migration and Converters |
| Mail server converters for a wide variety of competitors |
| Mailbox migration for email, calendar, contacts and tasks |
| Automation (Web Services/SOAP) |
| Compatible with wide variety of control panel companies |
| Add/edit domains users |
| Add/edit calendars, tasks and notes |
| Add/edit RSS feeds |
| Collaboration |
| Webmail reminders system |
| Webmail availability of attendees |
| Webmail personal contacts |
| Webmail personal calendars, tasks and notes |
| Mail Server Protocols |
| SMTP |
| IMAP4 and IMAP IDLE |
| POP3 |
| Message retrieval via POP and IMAP |
| Anti Spam Measures |
| Incoming and outbound spam checking |
| Spam quarantine (outgoing messages only) |
| Spam checking on POP3 message retrieval |
| Outgoing spammer detection and limiting |
| SPF record checking |
| RBL listing detection |
| Reverse DNS checking |
| Greylisting (based on IP, sender location, spam weight, etc.) |
| DKIM Mail Signing |
| Configurable spam headers |
| Trusted senders |
| Requiring SMTP authentication for outgoing messages |
| Antivirus |
| Out-of-the-box ClamAV |
| Support for third-party real-time antivirus solutions |
| Support for third-party command-line antivirus solutions |
| Security/Attack Prevention |
| Incoming and outgoing TLS |
| Incoming and outgoing SSL |
| Optional alternate SMTP port |
| SMTP authentication by domain |
| Restrict administrator access via IP |
| Brute force detection for Webmail |
| Manual and automatic IP whitelisting/blacklisting |
| Automatic harvest attack prevention |
| Automatic denial of service prevention |
| Malicious script filtering in webmail |
| Throttle user and domain activity |
| Throttle incoming bounces to prevent saturation |
| Web Interface (Webmail) |
| Multi-language compatible |
| Optimized AJAX controls provide desktop application performance |
| Compatible with mobile devices |
| Preview message attachments |
| New message notifications from anywhere in interface |
| Thumbnails for image file attachments |
| Download all attachments as .ZIP |
| Upload attachments in the background |
| File storage |
| Automatic save as draft |
| Click-to-map, click-to-call and click-to-mail functionality |
| Follow-up flagging |
| Linked emails and tasks |
| Advanced content filtering |
| Advanced spam filtering rules |
| User-level auto-clean |
| Support for multiple languages |
| Email address auto-complete similar to Microsoft Outlook |
| Import and export contacts |
| Support for user and domain aliases |
| Multiple signatures support |
| Multiple identity/SMTP support |
| Mailing Lists |
| Bounce detection |
| Automatic removal of subscribers on bounces |
| Optional double opt-in |
| Subscriber custom fields |
| Friendly unsubscribe links in messages |
| Common subscriber database for all mailing lists |
| Merge variables and custom fields into messages (mail merge) |
| Toggle auto-generated response to mailing list commands |
| Enhanced mailing list compose with attachments |
| Customized command messages |
| Mail logging per subscriber |
