You have implemented Note 1947241. SICF_SESSIONS transaction and SPNEGO are also enabled in your system. Since the note has been been applied, incoming emails are no longer possible. You have also seen the following errors in the in ICM log:
HTTP/1.1 401 Unauthorized
Cannot access "/sap/public/icman" (rc=401)- please check node in TA sicf
SAP_BASIS 702 and above
KBA , BC-MID-ICF , Internet Communication Framework , BC-CST-IC , Internet Communication Manager , Problem
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