You don't do it like this.... First post what you did to find the cause of your problem.
What recent events happened (if any) before the server stopped sending mails ? What's the error message you receive ? That error code isn't enough, at least for me it's not. Check readproctitle and see what messages you get there. You can check the readproctitle process with the 'ps aux' command. Check the logs and post the part with the delivery here. Check to see what e-mail does not get sent: from a remote client or directly from the server ? (try from webmail) > Hi List, > I found error 4.3.0 as the cause why my qmail can not send. What I want > to know is which files is read during the smtp phase? > > Regards > > > Willy > -- > Ketik REG JP ke 5454 (Telkomsel) en lo pade bisa menangin nonton Fall > Out Boy di Jepang GRATIS (TIKET n AKOMODASI n VISA). Buruan cuma 1 > bulan periodenya!! > > FYI ketik REG RAMAL ke 888 (Esia) bisa bikin kamu lebih mengerti hidup > ini, gak percaya? > > Mo jalan-jalan ke ROMA n GRATIS (TIKET n AKOMODASI n VISA) pula? Hari > genee?? Cukup ketik REG ROMA kirim ke 9899 (INDOSAT) > > ACHTUNG!!! jangan ngaku anak rock kalo gak kenal ROLLING STONES, n jgn > lewatin konser gilanya di Jerman. Mo nonton? Gak punya duit beli tiket, > akomodasi n visa? Ketik REG JER n lo kirim dah ke 9899 (XL) > >