SqWebMail is the webmail module that's bundled with the Courier mail server. SqWebMail can also be packaged separately, and used with any other mail server that uses maildirs. NOTE: SqWebMail DOES NOT support traditional Mailbox files, only Maildirs.


  • SqWebMail is very fast, and light. It accesses maildirs directly, and does not use an IMAP server.
  • Dynamically-generated HTML is stored in external files. Many (but not all) display elements can be customized without changing the program code.
  • Hierarchical mail folders, and shared folders.
  • Virtual accounts or system accounts. Virtual accounts may be managed via LDAP, MySQL, PostgresSQL, or flat files compiled into a GBDM/DB database.
  • Address books.
  • Extensive MIME support; defanged HTML mail; flowed text format; DSNs; and digests.
  • Javascript and cookies are not required. (There is some Javascript and cookie usage for some value-added stuff, such as print preview).
  • Spell checking with ispell.
  • Mail filtering with Maildrop.
  • Encryption and digital signatures with GnuPG.
  • Calendaring.