| Migration and Converters |
| Mail server converters for a wide variety of competitors |  |  |  |  |
| Mailbox Migration for email, calendar, contacts, tasks |  |  |  |  |
| Automation (Web Services / SOAP) |
| Compatible with wide variety of control panel companies |  |  |  |  |
| Add / edit domains and users |  |  |  |  |
| Add / edit calendars, tasks, and notes |  | |  |  |
| Add / edit RSS feeds |  |  |  |  |
| Retrieve user and domain statistics via web services3 |  |  |  |  |
| Collaboration |
| Over-the-Air mobile synchronization with SyncML v1.2 |  | | |  |
| Over-the-Air mobile synchronization with Exchange ActiveSync | | | | Add-on |
| Microsoft Outlook 2007 (2-way) synchronization |  | | |  |
| Microsoft Outlook 2000 and higher synchronization |  | | |  |
| Mozilla Thunderbird and Lightning synchronization |  | | |  |
| Webmail reminders system |  |  |  |  |
| Webmail availability of attendees |  | |  |  |
| Webmail personal contacts |  |  |  |  |
| Webmail personal calendars, tasks and notes |  | |  |  |
| Shared calendars, contacts, tasks and notes |  | | |  |
| Mail server Protocols |
| SMTP - Simple Mail Transfer Protocol |  |  |  |  |
| IMAP4 - Internet Message Access Protocol and IMAP IDLE |  | |  |  |
| POP3 - Post Office Protocol |  |  |  |  |
| LDAP – Lightweight Authentication Directory Protocol |  |  |  |  |
| Message Retrieval via POP and IMAP |  | |  |  |
| Antispam Measures |
| Commtouch Premium Antispam | | | Add-on | Add-on |
| Spam profiles wizard |  |  |  |  |
| Incoming and outbound spam checking |  |  |  |  |
| Spam checking on POP3 message retrieval |  | |  |  |
| SMTP connection level spam checking |  |  |  |  |
| Outgoing spammer detection and limiting |  |  |  |  |
| Spamassasin-based Pattern Matching Engine |  |  |  |  |
| Support for distributed SpamAssasin servers (Linux or Windows) |  | |  |  |
| SPF record checking |  |  |  |  |
| RBL listing detection |  |  |  |  |
| Bayesian filtering |  |  |  |  |
| Reverse DNS checking |  |  |  |  |
| Greylisting with rules based on IP, sender location, spam weight |  | |  |  |
| Domain Keys and DKIM |  |  |  |  |
| Configurable spam weights for system, domain and users |  |  |  |  |
| Configurable spam headers |  |  |  |  |
| Trusted Senders |  |  |  |  |
| Support for Declude |  |  |  |  |
| Antivirus |
| Commtouch Zero-hour Antivirus | | | Add-on | Add-on |
| Out-of-the-box ClamAV |  |  |  |  |
| Support for third-party real-time antivirus solutions |  |  |  |  |
| Support for third-party command-line antivirus solutions |  |  |  |  |
| Support for a remote ClamAV server (Linux or Windows) |  |  |  |  |
| Security / Attack Prevention |
| Incoming and outgoing SSL / TLS |  | | |  |
| Active Directory Authentication (ADX) |  | | |  |
| SMTP 587 submission-only port |  |  |  |  |
| Optional alternate SMTP port |  |  |  |  |
| SMTP authentication by domain |  |  |  |  |
| Restrict administration 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 |  | | |  |
| Reporting |
| Microsoft Silverlight charts and graphs |  |  |  |  |
| Real-time performance dashboards (traffic stats) |  |  |  |  |
| Basic reports (3 reports) |  |  |  |  |
| Advanced Summary reports (17 system and 18 domain) |  | |  |  |
| Advanced Trend reports (26 system, 15 domain, and 18 user) |  | |  |  |
| Data drill down available in Summary reports |  | |  |  |
| Define report favorites and custom reports |  | | |  |
| Scheduled and on-demand email reports |  | | |  |
| Reporting statistics exposed as PerfMon counters |  | | |  |
| Export reports to CSV and tab formats |  |  |  |  |
| Events and Notifications |
| Event-driven architecture |  |  |  |  |
| Notification profiles |  |  |  |  |
| Configurable system, domain and user events |  | |  |  |
| Assign actions to events (e.g. command-line, notifications, etc.) |  | |  |  |
| Default notification to all users when disk quotas are reached |  |  |  |  |
| Message Archiving |
| Sorbanes-Oxley compliance4 |  | | |  |
| Enable message archiving by domain |  | | |  |
| Messages .ZIP compressed to reduce space necessary |  | | |  |
| User, domain and administrator access to archived messages |  | | |  |
| Search, view and print archived messages |  | | |  |
| Messages stored in EML format |  | | |  |
| Administration |
| Administration from a Web browser |  |  |  |  |
| Getting Started wizard |  |  |  |  |
| Custom skinning (additional skins provided) |  | |  |  |
| Review and download log files from interface |  |  |  |  |
| Users can be limited to specific protocols IMAP,POP, SMTP |  |  |  |  |
| Mass propagation of settings for domains |  | |  |  |
| Mass propagation of settings for users |  | |  |  |
| Mass messaging to some or all users and domain admins |  | |  |  |
| Prioritize SMTP based on message type, domain, or user |  | | |  |
| Spool functionality that allow third-party integration |  |  |  |  |
| Configurable outbound SMTP IP addresses |  |  |  |  |
| Multiple spools (smart pooling) |  |  |  |  |
| Manage all connections |  | |  |  |
| Manage current blocks |  |  |  |  |
| Immediate blacklisting of connections and sessions |  | |  |  |
| Configurable user password strength requirements |  |  |  |  |
| Configurable user settings by domain |  |  |  |  |
| Configurable logging for all protocols |  |  |  |  |
| Folder auto-clean to enforce user quotas |  |  |  |  |
| Web Interface for Users (Webmail) |
| More than 15 languages available |  |  |  |  |
| Web 2.0 interface using optimized AJAX |  |  |  |  |
| Snapping panes for improved layout control |  |  |  |  |
| Preview message attachments |  |  |  |  |
| Thumbnails for image file attachments |  |  |  |  |
| Download all attachments as .ZIP |  |  |  |  |
| Upload attachments in the background |  |  |  |  |
| Automatic save as draft |  |  |  |  |
| Advanced content filtering |  | |  |  |
| Advanced spam filtering rules |  | |  |  |
| User-level auto-clean |  |  |  |  |
| Spell-check in 15 languages |  |  |  |  |
| Email address auto-complete similar to Microsoft Outlook |  |  |  |  |
| RSS,RDF, and Atom news feed integration |  |  |  |  |
| Import and export contacts |  |  |  |  |
| Support for user and domain aliases |  |  |  |  |
| Multiple signatures support |  |  |  |  |
| Multiple identity / SMTP support |  |  |  |  |
| Mailing Lists |
| Bounced detection |  | |  |  |
| Automatic removal of subscribers on bounces |  | |  |  |
| Optional double opt-in |  | |  |  |
| Subscriber custom fields |  | |  |  |
| Unsubscribe links in messages |  | |  |  |
| Common subscriber database for all mailing lists |  | |  |  |
| Toggle auto-generated response to mailing list commands |  | |  |  |
| Merge variables and custom fields into messages (mail merge) |  | |  |  |
| Create, preview, and save message for distribution |  | |  |  |
| Enhanced mailing list compose with attachments |  | |  |  |
| Customized command messages |  | |  |  |
| Mail logging per subscriber |  | |  |  |
| Message prioritization of mailing list |  | |  |  |
| Throttling of mailing lists |  | |  |  |
| Gateways |
| Use as SmartHost or incoming gateway |  |  |  |  |
| Use as Backup MX server |  |  |  |  |
| Use as outgoing gateway |  |  |  |  |
| User authentication and SSL / TLS support for outgoing gateways |  |  |  |  |
| Gateway authentication with other SmarterMail servers |  |  |  |  |
| Gateway can have domain exceptions |  |  |  |  |
| Spam checking available on gateways |  |  |  |  |
| Greylisting available on gateways |  |  |  |  |