I get those lines in my syslog : Mar 8 18:59:50 n22unst4 imapd: Failed to create cache file: maildirwatch (tfoerste@n22unst4.uml_domain) Mar 8 18:59:50 n22unst4 imapd: Error: Input/output error Mar 8 18:59:50 n22unst4 imapd: Check for proper operation and configuration Mar 8 18:59:50 n22unst4 imapd: of the File Access Monitor daemon (famd). Mar 8 18:59:50 n22unst4 imapd: Failed to create cache file: maildirwatch (tfoerste@n22unst4.uml_domain) Mar 8 18:59:50 n22unst4 imapd: Error: Input/output error Mar 8 18:59:50 n22unst4 imapd: Check for proper operation and configuration Mar 8 18:59:50 n22unst4 imapd: of the File Access Monitor daemon (famd). w/o famd being started. I do have : # grep =YES /etc/courier/* 2>/dev/null | grep -v dist /etc/courier/esmtpd:ESMTPDSTART=YES /etc/courier/imapd:IMAPDSTART=YES Furthermore I use mysql for authentication, /me wonders whetehr a check like this : grep ^authmodulelist= /etc/courier/authlib/authdaemonrc | grep -q authmysql can be used too to automatically use/need mysql too ?