Post-Office Software for Windows

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Browse free open source Post-Office software and projects for Windows below. Use the toggles on the left to filter open source Post-Office software by OS, license, language, programming language, and project status.

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  • 1
    SwithMail
    Send SMTP email silently from command line (CLI), or a batch file using Exchange, Gmail, Hotmail, or Yahoo! Plus. Supports XML settings files, variables, or all settings explicitly from the command line. Now supporting Exit Codes for batch file use (will return "0" for successful delivery, or "1" for error delivering) - handle your batch file accordingly.
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    Downloads: 32 This Week
    Last Update:
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  • 2

    HERMES Mail

    The cult-favourite eMail client formerly known as Qualcomm Eudora

    eMail traffic is on the rise. With over 100 man-years of development time behind it and a clean, intuitive interface that makes handling messages a breeze, Hermes Messenger (formerly known as QUALCOMM Eudora) is more than a way to send and receive mail: it's a powerful management tool with features to increase your productivity and enhance your communications. It is the best eMail program for people who get lots of it. If you're not yet one of them, you soon will be. Take control of your eMail before it takes control of you! Hermes provides industrial-strength communication, free of ads and free of cost.
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    Downloads: 30 This Week
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  • 3
    FreePOPs is a webmail to pop3 conversion daemon. It is extensible to support other webmail using the scripting language LUA. See the homepage for supported webmails.
    Downloads: 25 This Week
    Last Update:
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  • 4
    PopTray is a mail notifier written in Delphi for the Windows platform. It sits in your tray notification area and check mail from multiple accounts on a timer interval. Preview, Delete, Rules, Plug-ins and translated into more than 30 languages.
    Downloads: 23 This Week
    Last Update:
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  • 5
    YPOPs! is an application which emulates a POP3/SMTP mail server and provides free POP3 and SMTP access to Yahoo! Mail. It does not depend on Yahoo's POP3/SMTP mail server. You can use a mail client of your choice!
    Downloads: 10 This Week
    Last Update:
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  • 6
    hMailServer is a SMTP/POP3/IMAP server for Windows. Data is stored in MySQL/MSSQL database and is easily accessed using the COM library. Project info, trackers and downloads has moved to www.hmailserver.com.
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    Downloads: 20 This Week
    Last Update:
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  • 7
    Convert Webmail to POP3.Is also included a SMTP/POP3 tunneling system that allow send and receive email in a private network HTTP PROXY based. All connection are plugin based. Over 450 email server supported and tested, GMAIL POP3/SMTP over Proxy Network.
    Downloads: 7 This Week
    Last Update:
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  • 8
    ZMail allows you to send email from anyone, to anyone. You can use ZMail to send fake or anonymous emails. Have fun!
    Downloads: 16 This Week
    Last Update:
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  • 9
    GreenMail is an intuitive and easy-to-use test suite of email servers for testing purposes. Supports SMTP, POP3, IMAP with SSL socket support, and configurable user accounts and credentials. All in 100% Java. WE'VE MOVED TO GIT HUB: https://github.com/greenmail-mail-test/greenmail
    Downloads: 5 This Week
    Last Update:
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  • 10
    Columba
    Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.
    Downloads: 3 This Week
    Last Update:
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  • 11
    Hastymail
    Hastymail is a fast, secure, rfc-compliant, cross-platform IMAP/SMTP client application written in PHP providing a clean web interface for sending and reading E-mail. This version of Hastymail is no longer being developed. We are now working on a new version, Hastymail 3, AKA, "Cypht". http://cypht.org
    Downloads: 2 This Week
    Last Update:
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  • 12
    MyPhPim is A Multi-User, Personal Information Manager, including email client, addressbook, notes, todo and calendar, Written In PHP.
    Downloads: 3 This Week
    Last Update:
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  • 13
    GLX Mail Windows
    GLX Mail for Windows is the email program for your Windows PC. It retrieves your emails from all providers, organizes them clearly, and backs them up automatically. All email accounts in one place Any number of accounts: web.de, GMX, freenet, Gmail, Outlook, T-Online, your own server, and all other providers. IMAP is the default setting, so your emails stay the same across all devices. POP3 is also available if you’d rather keep your emails only on your PC. GLX Mail automatically detects the server settings. All you need to do is enter your email address and password. Familiar interface Three columns for folders, emails, and previews—you can adjust the column widths yourself. Drag emails into folders with the mouse; right-click menus and small icon buttons right next to each email: Move, Forward, Spam, Delete. Select multiple emails and delete, move, or forward them all at once. Quick search across all folders. 12 themes, available in German and English. Report spam with GLX
    Downloads: 5 This Week
    Last Update:
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  • 14
    Blue HttpMail is a library that connects to HTTPMail servers (such as hotmail.com) and a proxy that allows POP3, IMAP and SMTP access to those servers. Blue HttpMail is being developed using the open source library Blue http://bluelib.sourceforge.net
    Downloads: 3 This Week
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  • 15
    Cassiopeia's BitMail

    Cassiopeia's BitMail

    Encrypting E-Mail Client

    BitMail is a Proof-of-Concept- / Design-Study for an Qt E-Mail Client. POP3 / IMAP / SMTP / P2P E-Mail-Client. ● Qt E-Mail Client. ● Build-in Encryption to secure E-Mails ● IMAP & POP3 ● Additionally a full decentral P2P Email-Option via the Echo Protocol ● Store Email for Offline-Friends in the P2P Network. ● Chat and Instant Messaging is build in. ● POPTASTIC function (Chat over Email) ● Calendar widget functionality. ● Open Source. BSD License. "Cassiopeia is the tortoise of Momo, which can communicate through writing on her shell and guides into the future." - Wikipedia. Source from: https://sf.net/projects/spot-on/files/ & https://github.com/textbrowser/spot-on
    Downloads: 3 This Week
    Last Update:
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  • 16
    Automated Server Monitor (ASM) has been designed to monitor 1..n servers for service availability. This includes checking any TCP/UDP service, many popular databases including Firebird, MySQL and SQL Server. ASM has been written using Delphi and C#.
    Downloads: 2 This Week
    Last Update:
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  • 17
    Small program, which monitors email account via IMAPS (secure version of IMAP) protocol and inform user about new, unread messages. Coded in Java programming language.
    Downloads: 2 This Week
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  • 18
    Mail Monitor++ POP3 monitor.
    Downloads: 2 This Week
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  • 19
    PerlPop3 is a pop3 server written entirely in Perl. It is not memory hog as other pop3 servers, and pretty fast processing thousands of mails. Can be extended to use a database (and use APOP authentication). As a script can be modified as per your ne
    Downloads: 2 This Week
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  • 20
    Graphical OS Kernel compiled with gcc 4.6.1 and nasm 2.09.08
    Downloads: 2 This Week
    Last Update:
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  • 21
    can send mails without a mail account. preview and manage up to 20 pop3-mailboxes, view only mail headers first. Mail adress scanner to find mailadresses in files. can send mails by using Remailers. Has a Header-Editor.
    Downloads: 2 This Week
    Last Update:
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  • 22
    'betoffice' is a Java based football management tool (someone would say a 'betting-office'). It helps to organize a betting office around some football matches.
    Downloads: 2 This Week
    Last Update:
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  • 23

    sender

    tcp/ip utility for testing network connections/ports

    Sender is a windows tcp/ip client/host that lets you send and recieve text to and from tcp/ip ports. It now has a hex mode so that you can send any 8bit byte combinations. It can be used for testing simple pop and smtp connections (original project reason) or for any other protocols for which you may want to test by hand from windows.
    Downloads: 2 This Week
    Last Update:
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  • 24
    An IMAP E-mail client for X-Windows written with GTK. Supports IMAP with and without SSL.
    Downloads: 1 This Week
    Last Update:
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  • 25
    Java SMTP/POP EMail Server
    Provide an Open Source Java Email Server that supports POP3/SMTP.
    Downloads: 1 This Week
    Last Update:
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