On Fri, Dec 19, 2008 at 02:47:49PM -0500, Brian Evans - Postfix List wrote:
> Pedro Augusto wrote:
> > Good day,
> >
> > I'm having some strange problems with Postfix.
> >
> > It works perfectly, I have no problems sending or receiving e-mail but
> > sometimes the user can't receive any e-mail using his client (such as
> > Outlook Express) or through webmail. When we check the mail file, the
> > first line is full of @ signs. The situation only gets back to normal
> > when we remove all of these @ signs from the first line of the file.
> >
> > This only happens with some users and not all the time. I'm using
> > Postfix 2.2.10, Dovecot 0.99.11-9 without virtual domains, Mailscanner
> > and Clamav on a CentOS 4.7 box.
> >
> > If you need more details, just let me know.
> This sounds like a classic symptom of a Mailscanner mangle.
>
> It is not supported on this list and may mangle or lose emails at random.
Or perhaps a mailbox locking problem. Those "@" characters may well be
ASCII NUL bytes which represent "holes" in the file because the delivery
agent is appending to a file which another program truncates (and locking
problems cause unsafe concurrent access).
--
Viktor.
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