> Unless you have a need for the non-plaintext mechanisms, try removing > these plugins. Sieveshell will try to use the "best" (highest SSF) > mechanism that it finds. If you only have PLAIN and/or LOGIN installed, > it will have no choice but to use one of these, which should then use > your PAM config.
On my system, cyradm uses DIGEST-MD5 and succeeds, while sieveshell uses DIGEST-MD5 and fails.
