postfix/trivial-rewrite[30414]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains

I am facing strange problem in my ispconfig from last two days. The error log is as
Mar 27 11:17:27 ns1 postfix/smtpd[28072]: warning: problem talking to service rewrite: Connection reset by peer
Mar 27 11:17:27 ns1 postfix/smtpd[26710]: warning: problem talking to service rewrite: Success
Mar 27 11:17:27 ns1 postfix/master[5274]: warning: process /usr/lib/postfix/trivial-rewrite pid 30316 exit status 1
Mar 27 11:17:27 ns1 postfix/smtpd[29239]: warning: problem talking to service rewrite: Success
Mar 27 11:17:27 ns1 postfix/smtpd[29120]: warning: problem talking to service rewrite: Connection reset by peer
Mar 27 11:17:27 ns1 postfix/master[5274]: warning: process /usr/lib/postfix/trivial-rewrite pid 30317 exit status 1
Mar 27 11:17:29 ns1 postfix/smtpd[10634]: fatal: watchdog timeout
Mar 27 11:17:30 ns1 postfix/master[5274]: warning: process /usr/lib/postfix/smtpd pid 10634 exit status 1
Mar 27 11:17:30 ns1 postfix/master[5274]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
Mar 27 11:18:27 ns1 postfix/proxymap[26694]: warning: connect to mysql server 127.0.0.1: Lost connection to MySQL server at 'reading initial communication packet', system error: 0
Mar 27 11:18:27 ns1 postfix/proxymap[26694]: warning: connect to mysql server 127.0.0.1: Lost connection to MySQL server at 'reading initial communication packet', system error: 0
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30414]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30415]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30416]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30417]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30418]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30419]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30420]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30421]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30422]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem
Mar 27 11:18:27 ns1 postfix/trivial-rewrite[30423]: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem

http://pastebin.com/crUuv8kr

Dear Falko Please help me. I am not able to send mail from my server.

 

the server is around one year old. I have used how to forge tutorial. My machine is Ubuntu 10.04. I have forgotten the link actually what i followed.

 

Here is the log of mail.log
http://pastebin.com/NQgQtrbX

 

I have restarted both services and tried rebooting the machine but not working. I am searching over the net and not able to get solution. please help me . Do you require any other log for this ?? please tell me.
When I pgrep postfix
I don't see any process of postfix.
But i can see mysql