Server Implementations
- Apache James
- cloud mix
- Citadel/UX
- Courier Mail Server
- Cyrus IMAP server
- DBMail
- Dovecot
- Eudora Internet Mail Server
- Mailtraq
- Nginx
- qmail-pop3d
- Qpopper
- RePOP
- UW IMAP
- WinGate
- Zimbra
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