Sylpheed
6.4#107 in email clientsFree planFree planLinuxmacOSWindows
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| Fact | Sylpheed | Zoho Mail |
|---|---|---|
| Email security | It optionally supports GnuPG message signing and encryption, and SSL/TLSv1 connections for POP3, IMAP4, and NNTP. | Zoho Mail lists TLS, S/MIME, and AES-256 encryption at rest among its security features. |
| Free plan | Yes | Yes |
| Integrations | Sylpheed can call external commands for filtering and message composition, and can work with fetchmail or procmail for receiving mail. | Native integrations include Zoho CRM, Creator, Projects and WorkDrive, while Zapier connects more than 750 third-party apps. |
| License | The maker describes Sylpheed as free software distributed under the GNU GPL, with its library part under the GNU LGPL. | The desktop client is distributed under a Zoho Software License Agreement for use with the hosted service. |
| Product | Sylpheed is a lightweight, user-friendly email client designed for beginners through power users. | Zoho Mail provides custom-domain email hosting for businesses. |
You want what its maker publishes above — check its page for the details.
It suits organizations seeking custom-domain email with administrative controls and security features. The free plan is an option for up to five users who do not need IMAP, POP, or Active Sync.