The IETF maintains several key email related protocols that relate to message delivery to mailstores and mailstore access. These include the following: IMAP (RFC3501) SIEVE (RFC5228) ManageSieve (RFC5804) From time to time, there are bursts of work to do and the motivation and critical mass to do it. When such bursts coincide, it's important to give them a home. This working group provides such a venue. The WG will work on updates, extensions, and revisions to the above email protocols. Upon formation, the working group will consider any existing Internet Drafts that could be appropriate for its processing. While an interest poll for a new related idea is fine, the WG should avoid detailed discussion of work items lacking an Internet-Draft. The working group will start with processing the backlog of IMAP/Sieve extensions. Once this is done it will continue processing submitted IMAP/Sieve extensions, as well as work on a revision of IMAP (RFC 3501). Work on updating this RFC will include appropriate corrections, clarifications, or amplifications to reflect existing practice or to address problems that have been identified through experience with IMAP as currently specified. Also eligible for consideration is the incorporation of accumulated errata or consolidation with newer documents that have updated and/or extended the base specification. However, any new functionality is expected to be pursued via extensions rather than changes to the base protocol wherever possible. If there is interest in revising SIEVE (RFC5228) and ManageSieve (RFC5804), the WG will recharter. Expressly excluded from this charter is work on any protocol for which a dedicated working group already exists, such as DMARC, DCRUP or JMAP, as well as any work on POP3, SMTP/LMTP and email format/MIME. However, each working group should endeavor to remain aware of the activities of the other and collaborate as needed.