Webmail send mail error

[jonas1045]

i am getting this error when i send a mail in the webmail:

ERROR:
Message not sent. Server replied:
Service not available, closing channel
421 4.3.0 collect: Cannot write ./dfo0S9FcZi023975 (bfcommit, uid=0, gid=108): No such file or directory

I am using the latest ispCP and latest Debian Lenny.
Someone there can help me ?

[kilburn]

and the corresponding postfix logs say...?

[jonas1045]

Where do i find that? (sorry new to hosting server )

[kilburn]

Where can I find relevant logs to solve a problem?

[jonas1045]

Thanks, here is the mail.err content:
Jan 28 00:39:54 srv1 postfix/master[13956]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 00:50:05 srv1 postfix/master[32060]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 01:18:22 srv1 postfix/master[22125]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 01:25:00 srv1 postfix/master[15731]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 01:28:09 srv1 postfix/master[28344]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 10:11:27 srv1 postfix/master[7676]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 11:48:17 srv1 postfix/master[23595]: fatal: bind 0.0.0.0 port 25: Address already in use
Jan 28 11:53:57 srv1 sm-mta[10021]: o0S8ru79010021: SYSERR(root): collect: Cannot write ./dfo0S8ru79010021 (bfcommit, uid=0, gid=108): No such file or directory
Jan 28 12:15:39 srv1 sm-mta[23975]: o0S9FcZi023975: SYSERR(root): collect: Cannot write ./dfo0S9FcZi023975 (bfcommit, uid=0, gid=108): No such file or directory

[kilburn]

You have sendmail installed and running! Ispcp only supports postfix, so you did something wrong during installation (sendmail should have been removed!).

Moreover, ispcp is supposed to be installed on a CLEAN server, and sendmail is not installed by default on debian so you obviously installed on a non-clean server...

[jonas1045]

Clean without os or ?
I just installed Debian before i install ispCP, and i choose remove sendmail then i install it.

[kilburn]

Clean with a just-made base installation. Debian does *not* install sendmail (it uses exim by default), so you've a somehow mangled base installation...

[jonas1045]

It is a vps, and in my controlpanel on the host i can install what linux dist i will. I choose a clean Debian 5.0, install lenny and after that i install the latest version of ispCP.

What can i do?