Maildrop with qmail

[c.s.prakash]

i have installed maildrop to filter incomming mail to user account

its vpopmail+qmail+sqwebmail+maildrop

the problem is when i run maildrop in command mode it works fine ie as root
only but when i send a mail thru sqwebmail its in the mail-queue and after
timelimit it sends the error mail to sender which has

Subject: failure notice

Hi. This is the qmail-send program at infinite.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<csp at 123.com>:
/usr/local/bin/maildrop: Unable to create a dot-lock.
I'm not going to try again; this message has been in the queue too long.

--- Below this line is a copy of the message.
..

i got virtaul domain in vpopmail and accounts in that

when i run maildrop su - qmaild
it show the error

ERR: authdaemon: s_connect() failed: Permission denied
maildrop: Temporary authentication failure.

but qmaild is in trusted users list in config.h

i had also removed the filter now .mailfilter has

#MFMAILDROP=2
#
# DO NOT EDIT THIS FILE.  This is an automatically generated filter.

FROM='csp at 123.com'
import SENDER
if ($SENDER eq "")
{
 SENDER=$FROM
}

to "./Maildir/."

what is the problem?

--
C.S.Prakash
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