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Browse free open source Post-Office software and projects 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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    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

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  • 1
    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: 10 This Week
    Last Update:
    See Project
  • 2
    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:
    See Project
  • 3
    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: 1 This Week
    Last Update:
    See Project
  • 4
    Mailster is a project aimed at testing software mail capabilities. It provides a mail server container to test emails sent by your apps without rewriting your application code.
    Downloads: 2 This Week
    Last Update:
    See Project
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    MongoDB Atlas runs apps anywhere

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  • 5
    ClamMail is POP3 email proxy for Windows with integrated ClamAV antivirus engine. ClamMail is an Windows antivirus that protects your PC from viruses transferred via mail. Works with Outlook,Thunderbird,Eudora and many others using popular POP3 protocol
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    New Maintainer wanted! I'm looking for a new maintainer for this project because I'm not able to attend it anymore. If you want to help please write to kuddel-fl. KShowmail is a POP3 mail checker for the KDE with these features: show number, size and more information about mails on pop3 servers in a list view, show the mail headers or complete mails, delete unwanted mail from server by configurable filters.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    NOTICE: Keep in mind that POP3ye is alpha software and by definition it is a long way from finished. POP3ye is a fully featured web-based e-mail client written in Object Oriented PHP 5. It ony supports the POP3 protocol.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    DBMail provides a database-backend mail store using PostgreSQL or MySQL. It includes POP3 and IMAP servers to access the mail store, pipe and LMTP for message delivery, and a suite of command line utilities. Please click our Home Page link for more info.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    A mail system currently consisting of MDA, POP3, and IMAP servers that uses a SQL database for the mail store. This adds performance improvement as well as scalability and flexibility.
    Downloads: 0 This Week
    Last Update:
    See Project
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