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> Kevin Sullivan writes:
> > On my NetBSD-current machines I have strict quotas in /var/mail.  (The
> > users tend to leave things in their mail spool, so this encourages them
> > to clean up often.)  However, people's mailboxes still grow past their
> > quota.  I believe this is because mail.local runs as root and thus
> > doesn't care about quotas.
> > 
> > I'd call this a bug in mail.local.  Is there a way to fix this besides
> > hacking mail.local?
> 
> No, but wouldn't a simple mail.local hack to check the size of the
> mailbox and return an appropriate error to sendmail be better than
> having it die with a quota problem?

What we did at MIT-Athena back in 1985 or so was to have /bin/mail
(then used as the mail.local equivalent) set it's uid to the
delivered-to user before opening & writing to the mailbox; that way,
the quota was enforced.

In the event of a write failure, it would exit with one of the
well-known exit codes in sysexits.h so sendmail would clean up
sensibly.  I think we used EX_TEMPFAIL, but it's been a while...

For various reasons, I don't think this actually got deployed before
Athena switched to using POP exclusively.

						- Bill

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