Fast bidirectional synchronization for QRESYNC-capable IMAP servers


InterIMAP performs stateful bi-directional synchronization between two IMAP4rev1 servers. Compared to the so-called "full" synchronization solutions, InterIMAP is both much faster and parsimonious in network traffic.

Stateful synchronization is made possible by the QRESYNC extension from [RFC7162]; for convenience reasons servers must also support LIST-EXTENDED [RFC5258], LIST-STATUS [RFC5819] and UIDPLUS [RFC4315].

Furthermore, while InterIMAP can work with servers lacking support for LITERAL+ [RFC2088] and MULTIAPPEND [RFC3502], these extensions greatly improve performance by reducing the number of required round trips and it thus strongly recommended to use a server supporting these.

InterIMAP supports the COMPRESS=DEFLATE extension from [RFC4978]. It is enabled by default on remote servers advertising it, in order to reduce network traffic, especially for long-lived connections.

Upload more screenshots

Please help extend the collection of screenshots. Just make a screenshot and upload it here. You don't need to register or anything.

Upload a screenshot

Hint: upload an image here from your clipboard with Ctrl-V


Install this software package

If the package is available for the distribution you are currently using on your computer then install the software by clicking on…

Install interimap

Cookies help us deliver our services. By using our services, you agree to our use of cookies. Learn more