[Exim] Panic log : TCP port "smtp" is not defined for remote…

Hello,

I installed Exim 4.0 + Courier Imap + Squirrel Webmail.
Most of the time, everything works fine.

But when feeding MANY messages QUICKLY to exim thru a multithreaded batch
program, I have the following errors :

***********
2002-10-23 17:44:31 184NgM-00023k-00 == hassbouh@??? R=dnslookup
T=remote_smtp defer (-1): TCP port "smtp" is not defined for remote_smtp
transport
2002-10-23 17:44:31 184NgN-00023n-00 re-exec of exim (/usr/exim/bin/exim)
with -Mc failed: Permission non accordée
2002-10-23 17:44:31 184NgN-00023s-00 re-exec of exim (/usr/exim/bin/exim)
with -Mc failed: Permission non accordée
2002-10-23 17:44:31 184NgN-00023q-00 == recif2001@??? R=dnslookup
T=remote_smtp defer (-1): TCP port "smtp" is not defined for remote_smtp
transport
2002-10-23 17:44:31 184NgN-00023q-00 spool file rename error while
delivering: Permission non accordée
2002-10-23 17:44:31 184NgN-00023u-00 re-exec of exim (/usr/exim/bin/exim)
with -Mc failed: Permission non accordée
************

"Permission non accordée" means : "access denied"

First question :

Part of my config file is :

dnslookup:
driver = dnslookup
domains = ! +local_domains
transport = remote_smtp
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
no_more

and

# This transport is used for delivering messages over SMTP connections.
remote_smtp:
driver = smtp

So why the remote_smtp transport port error *sometimes* ?
How can I avoid this error?
With "port=25" ?

Second question :
In wich case does Exim "re-exec of exim (/usr/exim/bin/exim) with -Mc" ? Why
is access denied ? System file locking because of too much messages at the
same time ?


I search the list but didn't find the same errors. Please point me to
relevant messages if you know some.

Thanx
Jerry