Postfix a MySQL - Error: queue file write error

Ahoj, mám dotaz ohledne nastaveni posty. Pouzivam Postfix, ktery si bere vsechny uzivatele z MySQL. Vsechny zpravy se zda, ze prijemci dojdou, ale presto mi Postsix posila e-maily s timto obsahem:

Transcript of session follows.

 Out: 220 mail.bestsite.cz ESMTP Postfix
 In:  EHLO alexandria.csob.cz
 Out: 250-mail.bestsite.cz
 Out: 250-PIPELINING
 Out: 250-SIZE 10240000
 Out: 250-VRFY
 Out: 250-ETRN
 Out: 250-AUTH LOGIN PLAIN
 Out: 250-AUTH=LOGIN PLAIN
 Out: 250 8BITMIME
 In:  MAIL FROM:<od_koho@domena.cz> SIZE=3836
 Out: 250 Ok
 In:  RCPT TO:<komu@domena.cz>
 Out: 250 Ok
 In:  DATA
 Out: 354 End data with <CR><LF>.<CR><LF>
 Out: 451 Error: queue file write error
 In:  QUIT
 Out: 221 Bye

Podle vseho je zprava nakonec dorucena. Netusite nekdo, proc se to deje? Me napadlo, ze by se to mohlo stavat ve chvili, kdy je nedostupna databaze, jenze s tou by problem byt nemel, zatizena nijak neni. Jeste me napada, jestli to nemuze byt ve chvili, kdy je napr. vice pozadavku najednou. Ale nevim, jak to zjistit.

Log k tomuto e-mailu je tento:

Nov 30 08:56:31 herakles postfix/smtpd[30172]: connect from alexandria.csob.cz[195.144.99.104]
Nov 30 08:56:31 herakles postfix/smtpd[30172]: warning: restriction `reject' after `check_relay_domains' is ignored
Nov 30 08:56:31 herakles postfix/smtpd[30172]: 995D58DABB: client=alexandria.csob.cz[195.144.99.104]
Nov 30 08:56:31 herakles postfix/cleanup[29804]: warning: 995D58DABB: virtual_alias_maps map lookup problem for komu@domena.cz
Nov 30 08:56:31 herakles postfix/cleanup[29263]: warning: A030F8DABB: virtual_alias_maps map lookup problem for postmaster@mujserver.cz
Nov 30 08:56:31 herakles postfix/smtpd[30172]: disconnect from alexandria.csob.cz[195.144.99.104]

Diky za jakoukoliv radu.

Dotaz: Postfix a MySQL - Error: queue file write error