mlock -- lock a mailbox

Author

       mlock was written by Mark Crispin <mrc@cac.washington.edu> This man page was written for Debian GNU/Linux
       by Jaldhar H. Vyas <jaldhar@debian.org>

UW IMAP 2007f~dfsg-7.1                             2024-12-31                                           MLOCK(1)

Bugs

       No documentation other than this crappy man page,

Description

       If libc-client.so is unable to create a mailbox lock file, it will call this program.  This makes using
       the mailbox safe over i.e. NFS. There is no reason to call mlock yourself or through another program.  It
       is setgid mail so there is no need to change the permissions of /var/mail to 1777.