Are there any email hosting solutions that are compatible with Microsoft Exchange?

Emails are an indispensable part of modern communication. Especially for businesses, choosing the right email hosting provider is extremely important. The following services allow you to use Microsoft Exchange without hosting it:

• Microsoft Office Exchange offers an email hosting service which provides 50 GB of email storage, up to 10,000 recipients and real-time data synchronization. Whether you are using Outlook on your work PC, accessing your email using Outlook Web App or using your smartphone, all your information stays in sync. Exchange ensures data safety even when your servers are down. With features like conversation view, you can quickly organize your mails. Scheduling is also made easier with their Calendar sharing feature. You can chose to run an Exchange server on-site or move to cloud hosting. They also offer a built-in anti-virus system which protects you from spam and phishing attacks. They offer two plans, one which is priced at $4 and the other at $8. Both provide easy integration with Google Apps, DropBox, Microsoft Exchange, Outlook, Zapier, Evernote, most major CRM software and popular social networking apps. However, the $4 plan does not provide unlimited storage, hosted voicemail and Data Loss Prevention (DLP).
• Rackspace offers customizable servers, storage and network capacity to suit your individual needs. They provide the security of Cisco® ASA firewall and manage and monitor your infrastructure with their dedicated 24x7x365 support. They also offer a reliable One-Hour Hardware Replacement and 100% Network Uptime Guarantee. Their dedicated hardware with up to 36 processor cores and 1.5TB of RAM ensure unhindered work and performance. Their lowest paid plan is priced at $2 with 14 days of free trial but does not have Microsoft Exchange support. Their paid plan which is priced at $10 per month per user whilst offering integration with Google Apps, DropBox, Microsoft Exchange, Outlook, Zapier and other supported CRM software.
• Zoho Mail provides its users an unlimited number of inboxes, multi-domain hosting, custom URL, dual/split delivery, domain aliases, sub-domain stripping, calendar syncing and archiving. They provide one free plan and three paid plans for you to choose from. It has a minimalistic design and completely ad-free even on its free plan. It has a step-by-step wizard which helps you to quickly and easily set up an email. Zoho offers a 99.9% uptime guarantee and built-in anti-virus protection and spam filtering. It does not support SSL encryption, multi-domain hosting, integration with Google Apps or provide custom URL on its free plan but these features can be availed on paid plans. 
• Aabaco Small Business by Yahoo provides email hosting targeted at small businesses. It offers a custom mailbox for $34.95 which is billed annually and business mail which costs $9.95 per month. Each plan offers 20 MB email attachment size limits, access to email using Microsoft Outlook, website customization, a domain name, email protection with Norton AntiVirus Software and spam protection with SpamGuardPlus. With its filters, you can automatically organize your mails. It has an easy-to-use and powerful interface and offers dedicated 24-hour phone and email support.
• MailSMART by FuseMail offers two plans, a Standard plan at $2 and a Professional plan at $5. It offers features like multi-domain hosting, the ability to sync email easily across multiple devices, custom URL and high levels of data protection through their CypherSMART email encryption. They also have a dedicated service called SecureSMART to protect your mails from virus attacks and spam mails. With the feature of email archiving, you can prevent loss of data, however, this feature is not supported on the Standard plan. Other features include dual/split delivery, migration assistance, domain aliases, sub-domain stripping, push mail and integrations with Microsoft Exchange and Outlook.