The mailing list for listmasters using Sympa

["Allen, Pat" <address@concealed>]

Hi there -

I'm having some very strange behavior and I'm wondering if anybody has seen 
this before. I'm running Sympa 5.3.4 with virtual hosts. (I only mention the 
virtual hosts because I'm not sure if that may be contributing to the 
problem.) I'm using sendmail 8.13.8 connecting to an Exchange server as a 
smart host. I'm also using CNAME's to connect to the server; the physical 
name of the server is tundra.shore.mbari.org but the virtual host is 
listserver4.mbari.org.

When I send a new mail message to one of the lists, the message is delivered 
immediately (or close enough). When I use the web interface to post a 
message, it is delivered immediately. The same is true if I go to the 
archives, select a message and select the "reply to sender" or "reply to 
list". Delivery of the messages are OK. So far everything is working great.

The only problem that I'm having is when I select a message in the archive 
and hit the "send it back to me" button. If I watch my sendmail log, I see an 
entry saying that a message is being sent to the Exchange server but I never 
see it  in the Exchange tracking logs. Here are the sendmail messages which 
get generated when I click the button. Tundra.shore.mbari.org is the Sympa 
server and snow.shore.mbari.org is our front-end Exchange server.

Mar 17 10:12:27 tundra sendmail[10314]: m2HHCRDi010314: 
Authentication-Warning: tundra.shore.mbari.org: sympa set sender to 
address@concealed using -f
Mar 17 10:12:28 tundra sendmail[10314]: m2HHCRDi010314: 
address@concealed, size=831, class=0, nrcpts=1, 
msgid=<address@concealed>, 
relay=sympa@localhost
Mar 17 10:12:28 tundra sendmail[10315]: m2HHCSb4010315: 
from=<address@concealed>, size=1091, class=0, nrcpts=1, 
msgid=<address@concealed>, proto=ESMTP, 
daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Mar 17 10:12:28 tundra sendmail[10314]: m2HHCRDi010314: address@concealed, 
address@concealed (10001/10001), delay=00:00:01, 
xdelay=00:00:00, mailer=relay, pri=30831, relay=[127.0.0.1] [127.0.0.1], 
dsn=2.0.0, stat=Sent (m2HHCSb4010315 Message accepted for delivery)
Mar 17 10:12:28 tundra sendmail[10317]: m2HHCSb4010315: to=<address@concealed>, 
delay=00:00:00, xdelay=00:00:00, mailer=smtp, pri=121091, 
relay=snow.shore.mbari.org. [134.89.12.65], dsn=2.0.0, stat=Sent (2.6.0  
<address@concealed> Queued mail for delivery)

Has anyone seen this before?

Thanks!
Pat