| Anti-Spam Provisions: Anti-Spam provisions in sendmail 8.8.Howto guide to configure an anti-spam filter. |
| Mutt E-Mail Client: Mutt is a text-based e-mail client, similar to Elm and Pine. |
| OpenMail: Business-class messaging and collaboration for Linux and UNIX. Supports scheduling and other rich Microsoft Outlook functionality via MAPI, as well as internet e-mail standards like IMAP4rev1 and LDAPv3. |
| Ricochet: A program to automatically trace and report unsolicated e-mail (spam). |
| Samsung Contact: Samsung SDS's business messaging and collaboration / unified communication product, based on HP OpenMail. |
| Signature: Free, open-source producer of dynamic signatures for e-mail and news postings. Allow signing messages with a different .signature every time. |
| Spruce: The GTK+ Email Client |
Classical
