Unknown people appear in mailq - Have I been exploited?

Hello all, 1st post here.

When I type mailq I get about 10 to 15 entries with an aspect like
this:

m0ICJEbu013069 2213 Fri Jan 18 13:19 MAILER-DAEMON
(Deferred: Connection timed out with
office2.thesecttret.tv.)



(I have modified the domain name and the username to avoid bots
getting a real address).

I have checked these mail addresses against our mailing list
subscribers and they do NOT appear.

QUESTION:
How do I manage to KNOW WHO has enqueued those messages???

Thanks.
Xavi.

Re: Unknown people appear in mailq - Have I been exploited?

xmontero wrote:
> Hello all, 1st post here.
>
> When I type mailq I get about 10 to 15 entries with an aspect like
> this:
>
> m0ICJEbu013069 2213 Fri Jan 18 13:19 MAILER-DAEMON
> (Deferred: Connection timed out with
> office2.thesecttret.tv.)
>
>
>
> (I have modified the domain name and the username to avoid bots
> getting a real address).
>
> I have checked these mail addresses against our mailing list
> subscribers and they do NOT appear.
>
> QUESTION:
> How do I manage to KNOW WHO has enqueued those messages???
>
> Thanks.
> Xavi.

Probably NDRs for received spam mails to nonexisting email addresses.
You could prevent them by configuring some kind of 'valid recipient check'.


Peter
--
http://www.boosten.org

Mail: peter at boosten dot org

Re: Unknown people appear in mailq - Have I been exploited?

Hi Peter, thanks.

a) By NDRs you mean Non Disclesed Recipients?
b) But the domains are not mine. Why should my mailer try to re-parse
destinations not in my domains?
c) Which is the simplest way to chech if I already have some kind of
"valid recipient check" in my sendmail?

Thanks!
Xavi.

Howto valid recipient list?? [Was: Unknown people appear in mailq -

Hi Peter. I think your last response was directed to me instead to the
group.

> > [...] simplest way to check [...] "valid recipient check" [...]?

> If your server had it, it wouldn't accept the original mail in the first
> place, so you don't.

Which is the simplest way to setup "valid recipient check" in
sendmail?
(I use the mc to make the cf).

Thanks!
Xavi.