After committing to fedora-security CVS repo (:ext:cvs.fedora.redhat.com:/cvs/fedora fedora-security) following message was bounced back to me:

{{{
The original message was received at Mon, 25 Aug 2008 02:39:33 -0400
from bastion.fedora.phx.redhat.com [10.8.34.50]

----- The following addresses had permanent fatal errors -----
localdelivery@cvs1.fedoraproject.org
(reason: 550 Host unknown)

----- Transcript of session follows -----
550 5.1.2 localdelivery@cvs1.fedoraproject.org... Host unknown (Name server: cvs1.fedoraproject.org: host not found)

From: bonsai-daemon@redhat.com
To: localdelivery@cvs1.fedoraproject.org
Subject: cvs commit to fedora-security/tools/lib/Libexig
Date: Mon, 25 Aug 2008 06:39:29 +0000 (UTC)
X-Mailer: Mail::Mailer[v1.77] Net::SMTP[v2.29]

C|1219646369|thoger|/cvs/fedora|fedora-security/tools/lib/Libexig|Bugzilla.pm|1.6|||54|11
C|1219646369|thoger|/cvs/fedora|fedora-security/tools/lib/Libexig|Fedora.pm|1.7|||23|5
LOGCOMMENT
fix handling of bug aliases, which used to break add-tracking-bugs
add add-issue comment hint to be printed by add-tracking-bugs

:ENDLOGCOMMENT
}}}

All the commits are sent to fedora-security-commits list and the message was delivered to the list successfully:
https://www.redhat.com/archives/fedora-security-commits/2008-August/msg00000.html

Honestly, I'm not quite sure where this additional mail was sent to.