IMAP – UW Software Toolkit

Service Description

IMAP (Internet Message Access Protocol) is a method of accessing electronic messages kept on a mail server. The IMAP - UW Software Toolkit is a set of software written at and distributed under an open-source license by the University of Washington. While still available, the UW is no longer actively developing IMAP.

The IMAP - UW Software Toolkit includes the following:

  • c-client library: an API (application programming interface) used to build email clients and servers, including support for IMAP, POP3, SMTP and NNTP protocols, and for local mailbox file access on Unix and Windows
  • UW's POP2 (ipop2d), POP3 (ipop3d), and IMAP4rev1 (imapd) servers
  • mailutil: a utility program that helps manage email mailboxes (both local and IMAP/POP3/NNTP)
  • dmail: an MDA (Mail Delivery Agent) for use with procmail
  • tmail: an MDA for use with the system mailer (e.g., sendmail, postfix, etc.)


UW faculty, UW staff, UW students, General public

How to Order


The software is available for download at any time.


No charge.

Service Level Description

The IMAP - UW Software Toolkit is provided as open-source software. The UW is not able to provide detailed support for this software and is no longer actively developing it. However, there is an active community of users who have mailing lists and support each other.

Additional Information

Support Information

The following mailing lists discuss IMAP and the use of the IMAP - UW Software Toolkit: for discussions about the definition and implementation of the IMAP specification for questions regarding general IMAP usage for questions about the IMAP software, including UW imapd, ipop3d, mailutil, and the c-client library


Last Review Date: 04/26/2015