Zimbra Desktop
Zimbra Desktop is an offline client that lets you manage various email accounts in one desktop tool. Zimbra mail, Yahoo! mail, Gmail, Outlook and any other work or personal email account using POP or IMAP is easy to set up in Zimbra Desktop.
19 Alternatives To Zimbra Desktop
Airmail
Airmail is a lightweight and lightning fast mail client for Mac.
Apple Mail
There’s big news attached.
Carbonite
Unlimited online backup for one flat fee. Free trial, no credit card required.
Claws Mail
Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response
Evolution
Apps/Evolution - GNOME Wiki!
Front App
multi-channel inbox service for collaborative teams
Mailbird
Mailbird is the best email client for Windows 7, 8 and 10
Mailspring
Mailspring is a mail client for Mac, Windows and Linux.
Outlook
Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
PieSync
Seamless two-way sync between your CRM, marketing apps and Google in no time
Polymail
Native email app for email productivity.
Postbox
The Power Email App for busy professionals, like you.
Shift
Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
Spike
Spike is a content marketing platform that drives content recommendations to your target audience, helping to amplify your message and connect with customers.
Starfish ETL
The Starfish ETL (Extract Transform Load) Suite is a CRM integration and migration tool.
Sylpheed
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).
Zoho SalesInbox
Email client built exclusively for salespeople
eM Client
eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.
iRedMail
A fully fledged, free email server solution, an open source project (GPL v2).