From the command

doveadm log errors we get

Jan 31 15:41:12 imap(xxxx): Panic: Buffer full (8221 > 8192, pool <none>) Jan 31 15:41:12 imap(xxxx): Error: Raw backtrace: /usr/local/lib/dovecot/libdovecot.so.0(+0x5b83a) [0x7ffbaa3a783a] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x5b886) [0x7ffbaa3a7886] -> /usr/local/lib/dovecot/libdovecot.so.0(i_error+0) [0x7ffbaa36adaf] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x57cfc) [0x7ffbaa3a3cfc] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x5134f) [0x7ffbaa39d34f] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x4a02d) [0x7ffbaa39602d] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x4a0ca) [0x7ffbaa3960ca] -> /usr/local/lib/dovecot/libdovecot.so.0(i_stream_read+0x64) [0x7ffbaa3af924] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x6844c) [0x7ffbaa3b444c] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x685f1) [0x7ffbaa3b45f1] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x686d0) [0x7ffbaa3b46d0] -> /usr/local/lib/dovecot/libdovecot.so.0(i_stream_read+0x64) [0x7ffbaa3af924] -> /usr/local/lib/dovecot/libdovecot.so.0(i_stream_read_data+0x52) [0x7ffbaa3afc32] -> /usr/local/lib/dovecot/libdovecot-storage.so.0(+0x987ba) [0x7ffbaa69a7ba] -> /usr/local/lib/dovecot/libdovecot-storage.so.0(index_mail_get_binary_stream+0x135) [0x7ffbaa69ac45] -> /usr/local/lib/dovecot/libdovecot-storage.so.0(mail_get_binary_stream+0x61) [0x7ffbaa674481] -> /usr/local/lib/dovecot/libdovecot-storage.so.0(imap_msgpart_open+0xb0) [0x7ffbaa6cf980] -> dovecot/imap() [0x418619] -> dovecot/imap() [0x4166e2] -> dovecot/imap(imap_fetch_more+0x31) [0x416911] -> dovecot/imap(cmd_fetch+0x41f) [0x40cd9f] -> dovecot/imap(command_exec+0x3d) [0x414e2d] -> dovecot/imap() [0x41402e] -> dovecot/imap(client_handle_input+0x11d) [0x41431d] -> dovecot/imap(client_input+0x6f) [0x41468f] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7ffbaa3b5fe6] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xa7) [0x7ffbaa3b7027] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7ffbaa3b5f88] Jan 31 15:41:12 imap(xxxx): Fatal: master: service(imap): child 2236 killed with signal 6 (core dumped) where xxxx is the offending user name. The error repeats at random intervals, I guess related to the activity.

Since we are using Horde 5 on the front end we get the following errors from it:

Jan 31 15:02:59 thalia HORDE: [imp] Mail server closed the connection unexpectedly. [pid 6402 on line 390 of "/sys-data/WebData/horde/imp/lib/Imap.php"] Jan 31 15:02:59 thalia HORDE: [imp] Operation failed due to a lack of a secure connection. [pid 6402 on line 390 of "/sys-data/WebData/horde/imp/lib/Imap.php"] Jan 31 15:02:59 thalia HORDE: [imp] Operation failed due to a lack of a secure connection. [pid 6402 on line 390 of "/sys-data/WebData/horde/imp/lib/Imap.php"] Jan 31 15:02:59 thalia HORDE: [imp] Operation failed due to a lack of a secure connection. [pid 6402 on line 94 of "/sys-data/WebData/horde/imp/lib/Imap/Exception.php"] We believe these are related to the above Dovecot error since they happens together.

Is this a Dovecot problem? Config attached.

Thanx

-- Andreas Kasenides Senior IT Officer Dept. of Computer Science, University of Cyprus Tel: 22892714, Fax: 22892701