Emails lost !

[Mike Andrews]

On Thu, Nov 17, 2011 at 08:53:39AM -0800, Scott Silva wrote:
> on 11/17/2011 1:53 AM eric le corre spake the following:
> >hello and sorry for my enlish
> >
> >
> >I Have some trouble. I Have SpamAssassin version 3.3.1, 4.83.5 mailscanner,
> >postfix 2.8.2 on Ubuntu and MailWatch.
> >This Server is configured as gateway for my Exchange 2010.
> >
> >users complain of not receiving emails. Apparently it's quite often. Users
> >give me the address of the sender which certifies sending an email. On my
> >exchange, I have no trace of the mail in question. On Mailscanner either,
> >MailWatch in the mail does not appear either. In short, nothing a all. 
> >What is
> >even more annoying is that the sender does not receive an e-mail 
> >non-delivery.
> >So emails that are lost.
> >
> >Mailscanner in the logs I find nothing wrong.
> >
> >If someone could help me find an explanation .....
> >
> >I was wondering, but can be nothing to see there are a mailscanner script 
> >that
> >restarts the service regularly. Are the mails could not be lost just when
> >mailscanner restarts? possible?
> >
> >thanks
> >
> >
> And senders almost ALWAYS swear that they sent something, but when you ask 
> them for proof like log snippets, they suddenly get silent...

In my experience, the problem is almost always caused by a fat-fingered
E-mail address. I've never seen MailScanner lose a mail. Now, that being
said, if you have some sort of milter running that REJECTs a mail before it
gets to the DATA phase, you won't see the headers from that mail, and the
log entr(y|ies) can be much harder to track down. I run a milter that does
nothing but log CONNECTs, so that I know when a given IP address connected
to my inbound filter.

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin