Claws Mail

Free
Open Source
Windows
Linux
FreeBSD
Online

Claws Mail Alternatives

14
Options
Considered
2021-11-09
Last
Updated

#1 Mozilla Thunderbird

Free
Open Source
Windows
Mac
Linux
FreeBSD
Online
Github
Portableapps.com

Mozilla Thunderbird is an open-source email client tool that provides customized options to deliver the information in a formal way for personal or official purposes. It has been tailored for multiple user needs that doesn’t only enhance productivity but also formulate the electronic version of mails in a well-organized pattern through the latest technology and algorithms.

The enterprise owners or managers can set their tasks by organizing the different trials or creating the schedule and life’s important events in a calendar. It is a better way to stay in touch with colleagues or friends by sending formal letters or invitations, and the latest news can be shared or read via RSS mode. As Thunderbird is an open-source project, so anyone can participate in the collaborations and contribute ideas, designs, code, and time helping for the common users as well.

#2 Mailbird

Paid
Proprietary
Windows
Online

Mailbird is a desktop email client for Windows that helps admin to perform the various official tasks effectively by sending or receiving virtual dispatches, managing calendar events, scheduling, inviting, and several others. The users can control the multiple accounts and database to the centralized place and the business files can be retrieved according to the desired printing mode. The program is well-integrated with multiple official formats or communication software, such as Outlook, Gmail, Yahoo Mail, Social media, task management, file share, and video-conferencing integrations for exchanging details.

The snooze option facilitates you removing the default option from the inbox for a set period of time, and the previous settings are regained after completion of the task. The reading mode helps viewers to enjoy the functionality by displaying the email text word-by-word on a Blanc screen with customizing options. With the help of calendar integrations, all the days or months can be adjusted at a specific inbox categorization, and the messages can be sorted out easily along with a file weight or attachments. The module supports all IMAP and POP3 accounts from different outsource, and the comprehensive reading assistant option helps anyone reading easily.

#3 eM Client

Freemium
Proprietary
Windows
Mac
Online

eM Client is a valuable digital asset for enhancing the office productivity that has been designed for Windows and macOS to provide various options, such as email exchanges, calendar management, schedules set, contacts, file sharing, and many others. One of the ideal features of the program is the live chat facility that helps clients and stakeholders to establish more constructive interaction. The platform has been developed according to the diverse needs of the operators like the professionals or common users where they can communicate with other collaborators.

The program deals with multiple tasks by facilitating the admin via advanced rules management, notifications, mass mail, delayed send, or a built-in translator for incoming and outgoing messages as complete reading assistance. All the data or documents can be accessed from anywhere whether they are there in any folder or cloud hosting like Dropbox, Google Drive, OneDrive, ownCloud, or Nextcloud. It is completely compatible with the following renowned servers: iCloud, G Suite (Gmail, Hangouts, and others), MS Office 365, POP3, SMTP, IMAP, MS Exchange, IceWarp, SmarterMail, Kerio, MDaemon, and others to deliver the sync functions.

#4 Evolution

Free
Open Source
Linux
Online

Evolution is a personal productive client that helps an office or personal users to deal with multiple tasks, such as email exchanges for sharing important databases, calendar or events scheduling, address books, contacts, and several others. It is an ideal assistant for performing the collaborations by interacting with different discussions and meeting plans.

With the help of the GNOME issue tracker, the users can find the problems and errors in ongoing functionality to provide a reliable experience. The receivers or senders can check the detailed description in the comprehensive reading format, such as reports, invitation letters, upcoming memos, portable documents, and many others.

#5 Microsoft Office Outlook

Paid
Proprietary
Windows
Mac
Android
iPad
Tablet
Online

Microsoft Office Outlook is an effective & productive program for official or personal use that allows admin to manage diverse tasks, such as email & files exchanges, reports or memos sharing, calendar integrations, and others. It is an advanced way to connect via different sources whether you are at home or anywhere else, just share the important information in the form of standard formats and categories.

Sometimes, clients miss the exact and preplanned appointments due to the delay or busy routine works, so the module helps detect the day-to-day integration just like an ongoing calendar. One of the great-user friendly features is the automatic deactivation of unsafe links that contain phishing scams, viruses, or malware, and could harm the device.

#6 Mailspring

Freemium
Open Source
Windows
Mac
Linux
Ubuntu
Fedora
Online
Github

Mailspring is a flexible & fast data sharing program that facilitates the clients to exchange various official or personal tasks effectively by accessing multiple accounts and documents. It is accessible via major operating systems, such as Mac, Linux, and Windows to provide comprehensive commands for the users to enjoy the different themes and layouts along with a dark mode option. All the media interactions are localized into nine different languages, and the users can do the following read receipts, link tracking, undo or redo the sending times, and more.

As the business could be dealt with from anywhere in the world and diverse languages are spoken by the people, so the translating tool assists the clients in transforming various tongues into prior ones like English into Spanish, Russian, Simplified Chinese, French, German, and various others. The program provides collective implementations to all the synced profiles and searching or products checking can interact from any source, including the electronic signs. The single inbox helps you integrate the items to one place by supporting the major resources, such as Gmail, iCloud, Office 365, Outlook.com, Yahoo!, IMAP/SMTP, and several others.

#7 Postbox

Paid
Proprietary
Windows
Mac
Online

Postbox has been developed for the different professionals or official clients that helps exchange the information via different categories, such as email addresses, memos, documents, files, or any other valuable product. It is embedded with a comprehensive interface that carries multiple options to sort out the queries, and all the end-to-end encryptions are applicable to the conversations for keeping the collaborations up to date.

The module supports multiple accounts and forums, including IMAP or POP, Outlook, Gmail, iCloud, Yahoo, AOL, Office 365, Fastmail, ProtonMail, and many more. The users can discriminate the different files and documents by keeping the selective items separately as a personalized inbox. The tool manipulates the products effectively and enables the quick filters for organizing important emails like magic, and workspace can be checked in tabs by interacting with browsers with detailed descriptions, such as sender, subject, date range, or other attributes.

#8 FairEmail

Freemium
Open Source
Android
Tablet
Online
Github

FairEmail is an open-source client for exchanging valuable information in the form of standard formats, such as files, templates, documents, Gmail, Outlook, and several others. It provides complete privacy and encryptions by allowing multiple accounts and data integrations to the centralized place. The app is built-in with a unique interface that can change as a dark view for supporting reading efficacy at night look.

The module supports the different protocols, such as IMAP, POP3, SMTP, OpenPGP, S/MIME, and the two-way synchronization engages the multiple channels for operating the offline storage as a unified inbox. The users can observe the safe message view (styling, scripting, and unsafe HTML removed), and data is not delivered as a third-party audit.

#9 Kontact – Kmail

Free
Open Source
Windows
Linux
FreeBSD
Online

Kontact – Kmail is an all-in-one desktop-based productive program that provides multiple options for completing various communicative tasks, such as email, calendar, contacts, schedules, events, and others. With the help of an RSS feed, the users can read the content in a standard format, and all the contacts and public information can be managed easily via a single panel. The platform groups everything together in one place, and helps organize or deal with daily tasks.

The tool amalgamates all our PIM applications into a single window and provides a reliable experience as a powerful suite to control the huge database. All the upcoming events or appointments can be integrated via a calendar that supports you when the exact date is achieved. It supports large files and protocols, such as POP3, IMAP, Microsoft Exchange (EWS), and the contacts can be easily picked up by the manager to send the collective or separate message.

#10 Mutt

Free
Open Source
Windows
Mac
Linux
Online

Mutt has been the all-in-one productive client program that processes the diverse database collectively by allowing the files, documents, reports, memos, or any other domain to manage the database effectively, specially developed for the UNIX operating systems. For creating the text or basic templates, the users can handle the complete tasks with full control of message headers when composing is carried out systematically. The program is based on advanced algorithms that have the capability to sort out the exact designation in case of an alternative address or changed directives.

The tool supports the various domains, such as the multiple mailbox formats (mbox, MMDF, MH, maildir), POP3, IMAP, and other customized shortcut keys to configure the diverse tools. The users can respond to the clients with a collective reply and can be easily installed as (uses GNU auto-configuration). The members can get the notifications while receiving the items, and the searching via regular expressions provides an internal pattern matching language for comprehensive reading.

#11 Microsoft Mail and Calendar

Free
Proprietary
Windows
Phone
Windows S
Online

Microsoft Mail and Calendar is an effective centralized program that allows you to check the upcoming memos, letters, reports, documents, and other contact details with more options in a single place. The Mail and Calendar apps assist the users in staying up to date on the electronic version of messages by managing the schedule and appointments for completing the different formalities.

The users can perform their duties by dealing with complex or simple tasks easily and collaborate with other colleagues or friends with a timely response. It has been designed for both work and home, these apps help admin communicate quickly and focus on what’s important across all the accounts with any tension of lost queries. The tool is well-integrated with various suites by supporting Office 365, Exchange, Outlook.com, Gmail, Yahoo!, and other popular software.

#12 Sylpheed

Free
Open Source
Windows
Mac
Linux
Online
Github

Sylpheed is an open-source email client that allows you to stay in touch with upcoming files, documents, reports, memos, or other official collaborations with a reliable centralized forum to enhance productivity. The tool is accessed via major operating systems, such as BSD, Linux, macOS, Unix, Windows, and has been written in the C, GTK+ mode. It is free software distributed under the GNU GPL (the library part is GNU LGPL), and enables the operators to get the complete configurations by connecting the devices over virtual domains.

The spam filtering option helps clients to check the safe reliability of the messages, and all the items are checked critically for providing the user a better experience. The program supports the different global languages by dealing with Sylpheed’s website notes an attachment-tool plug-in, automatic forwarding, attachments via passwords, and the tool is unable to send HTML mail. The password is stored in the form of plaintext mode and only the admin can read the credentials by default efficacy, and the PGP Sign & PGP Encrypt options in the compose window are for the basic encryptions.

#13 The Bat

Paid
Proprietary
Windows
Online

The Bat is advanced & productive software that provides multiple options to manage official or personal collaborations by exchanging messages, memos, letters, reports, documents, and other items. The tool has been considered as a secure desktop email client for Windows, and all the credentials are protected from any third-party integrations.

The tool saves the information through multiple encryption streams all the collected details are kept via disk storage as end-to-end encryptions over safe protocols. One of the great specifications of the module is the private integrations that discourage cloud storage as the chances of email leaking are increased in this way, so no detail is demanded by the program. All the emails are stored at the computer system and no one can get access and interfere in details for decoding the memos, and the software is accessible via IMAP, POP, MAPI protocols.

#14 ElectronMail

Free
Open Source
Windows
Mac
Linux
Online
Github

ElectronMail is the email client tool that provides a comprehensive experience for the users to control the sending or receiving database with fast efficacy. All the major codes are available and anyone can customize the functionality according to the best of networking interests by setting the mounted features in a systematic way. The repository is available via major operating programs, such as Linux, OSX, and Windows with easy-to-install functionality by verifying the released packages.

The internal specifications of the tool have been written in TypeScript and use Angular. The tool deals with multiple accounts at the same time by performing the collective tasks and scans the items critically for sharing safe interactions. There are some prominent features of the utility, such as lightweight, configuration proxy per account support, import or export of files, dark mode, notifications, tray minimized option, calendar, alarm, moving folders, CSS injection, routing images, and many others.