#compdef mail mailx=mail Mail=mail mush zmail nail=mail

_arguments -s \
  '(-f -u)*-b[specify a BCC recipient]:BCC recipient:->userhost' \
  '(-f -u)*-c[specify a CC recipient]:CC recipient:->userhost' \
  '(-b -c -u -s *)-f+[specify mail folder]:mailbox:_mailboxes' \
  '(-f -u)-s+[specify a subject]:subject:' \
  "(-b -c -f -s *)-u+[read specified user's mail]:user:_users" \
  "(-f -u)*:recipient:_email_addresses -n $service"