I trying to send mail with PHP (engine - Drupal). But it can't send mail and write message about it in to log (nothing more that adressed).Part of /var/log/mail.err :Feb 14 19:55:30 hivede13-3220 dovecot: master: Error: service(auth): fork() failed: Cannot allocate memoryFeb 14 19:55:30 hivede13-3220 dovecot: master: Error: service(auth): command startup failed, throttlingFeb 15 17:14:30 hivede13-3220 dovecot: master: Error: service(imap-login): fork() failed: Cannot allocate memoryFeb 15 17:14:30 hivede13-3220 dovecot: master: Error: service(imap-login): command startup failed, throttlingBut free -m command after sending show next             total       used       free     shared    buffers     cached\             Mem:          1400       1011        388          0          0                           0             -/+ buffers/cache:       1011        388             Swap:            0          0          0It's meant that 388m free for usage in applications, right? If yes - how can I improve situation? UPD. top -b -n 1 | grep dovecot output1689 root      16   0 21244  912  644 S  0.0  0.1   0:00.00 dovecot1690 dovecot   18   0 12780 1024  844 S  0.0  0.1   0:00.00 anvil              Dovecot process id - 1689, cat /proc/1689/limits outputLimit                     Soft Limit           Hard Limit           Units     Max cpu time              unlimited            unlimited            seconds   Max file size             unlimited            unlimited            bytes     Max data size             unlimited            unlimited            bytes     Max stack size            10485760             unlimited            bytes     Max core file size        0                    unlimited            bytes     Max resident set          unlimited            unlimited            bytes     Max processes             771811               771811               processes Max open files            1024                 1024                 files     Max locked memory         32768                32768                bytes     Max address space         unlimited            unlimited            bytes     Max file locks            unlimited            unlimited            locks     Max pending signals       771811               771811               signals   Max msgqueue size         819200               819200               bytes     Max nice priority         0                    0                    Max realtime priority     0                    0                    
dovecot. Can't allocate memory, but free -m show available memory
debian;memory;dovecot