[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] O character in sendmail.cf configuration lines  O configuration command  o delivery agent flag  octal-type arguments  offsite primary name servers  offsite servers  ok message  OK value (access database)  open file descriptors  openlog command  operating system     errors on      file failure and      OSTYPE declaration for  optional database files  options for sendmail  2nd  [See also command-line switches]3rd  4th  5th      multi-character  2nd      safe  2nd      single-character  ORCPT address  orphaned locks  OSTYPE command (m4)  output     rule testing  overwriting files  ownership  [See permissions]