Office 365 / Exchange Online
(like IMAP Mail Hosting)
POP3 Mail Hosting
Secure connection – authentications are over secured channels.
Unsecure connection – authentications are done in plain text, which is susceptible to a man-in-the-middle attack, not always from outside the network, but sometimes inside as well.
No duplicate mail issues – mailbox contents are synchronized with server mailbox.
Duplicate emails when mail client loses information on the last email downloaded.
Synchronize your mailbox across multiple connected devices.
Emails sent or entries added on one device may not be on another, eg. messages sent from PC will not be accessible on a mobile device.
Push mail ensures emails coming in are immediate to all connected nodes.
Emails are received on scheduled timing indicated on mail clients.
25Gb of storage per mailbox ensure minimal issue on mail quota.
Mailbox sizes are usually smaller, shared between user accounts with a higher cost for bigger disk space.
For E2 plan, comes with a license to use the desktop version of Office Professional Plus 2013 (on up to 5 devices) alleviating the need to buy additional licenses for each desktop/device that is purchased. For the other Office 365 plans, you can still view & edit Words, Excel, Powerpoint files via web-based.
No option for office apps on any traditional mail hosting plans.
Flexibility to access your emails & calendar from multiple devices like PC, Mac, web, iPhones, or other mobile devices with similar & familiar view & interface.
Each device operates separately. Difficult to sync across all devices.
Global address list allows you to access centralized, frequently used contacts on the go.
Each contact list on each device operates separately from the others.
Support for multiple domains for a single fee.
Each additional domain will have additional costs.
Access your calendar on the go. All edits & entries are synchronized & similiar
Individual calendar on each device. New entries are not updated on all nodes.
Share calendar with the ability to control the amount of information accessible.
No calendar sharing support.
Sent Items, Drafts, Deleted Items are synchronized & whatever sent, created or deleted is available across all devices.
Each client operates separately & sent emails are usually CCed back to the sender for traceability.
Autodiscover allows automatic quick and easy configuration of new client seamlessly without technical knowledge on all newer version of Outlook client on both PCs & Mac
Need some technical knowledge & server information in order to setup mail clients.
Share a mailbox among a group of users accessing the same views & interface.
Mailbox is not similar without creating rules to cc copies of sent emails to the sender. Contacts created are on each individual client’s address book. POP3 locks mailbox on access by each device & rendering mailbox inaccessible to others until mail download is complete. The process is further delayed with “leave-a-copy-on-server” option being set.
Mails, contacts & calendar entries are retained on both client & server. Failed client systems can resync & recover all mail items prior to failure.
If “leave a copy on the server” option is not set, emails are downloaded on the client device and deleted from the server. In event of disk failure on the client system with no backups, all emails will be lost.
Native Exchange client support in Outlook.
No support or requiring connectors to work as Exchange client.
Mail retention policy enables retention of deleted email, to allow recovery or adhere to the corporate policy or regulatory reasons.
No control on mail messages once they are downloaded.
Advanced messaging features like the unified messaging system, instant messaging client, SSO (single sign-on support), hybrid deployment, etc.
Not available or limited advanced features on other hosted services.
Can Support 2007, 2010. But, cannot support Office 2000, 2003
Can Support Outlook 2000, 2003, 2007, 2010, 2013