Because IMAP was designed before SASL (in fact, SASL is a generalization of IMAP's AUTHENTICATE command), IMAP's SASL support lacks some features. One of them is clean support for authentication exchanges where the client speaks first. SASL-IR adds this feature to IMAP.
Most IMAP servers support SASL-IR, including Archiveopteryx. We expect most mobile email readers to support it, since it is part of the LEMONADE group of extensions.
In case of questions, please write to email@example.com.
Last modified: 2010-11-19