| In fact, locking any multi-message flat file that is directly accessed by
| an MUA or by a server such as imapd (UW imapd has the "mbox" driver too!)
| is always the right thing to do.
Good point. On several occasions I've posted code here, as replies to
others' questions, that omitted local lockfiles where regional lockfiles
were in effect, but I've never had occasion for such arrangements in my own
rcfiles, so I've never personally seen the effects.
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