HI, I downgraded my system back to stable (as far as possible, and it worked again. so I upgraded lib by lib's, and finally I found 2 lib's which cause the trouble.
upgrading libsasl2-2 and libsasl2-modules from version 2.1.22.dfsg1-23 to version libsasl2-2 2.1.22.dfsg1-23+b1. See bug #527161 Regardss Achim
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