hello there ,
i'm using mail($to,$subj,$mes); /($to,$subj,$mes,$header); to send out mail to gmail(for example).

This is mesej from /var/log/mail.info

Jul 9 12:49:42 ekl03yy postfix/pickup[11194]: 36F0F18DD5: uid=30 from=<wwwrun>
Jul 9 12:49:42 ekl03yy postfix/cleanup[11394]: 36F0F18DD5: message-id=<20080709044942.36F0F18DD5@ekl03yy.zz.gov.my>
Jul 9 12:49:42 ekl03yy postfix/qmgr[11198]: 36F0F18DD5: from=<wwwrun@ekl03yy.zz.gov.my>, size=429, nrcpt=1 (queue active)
Jul 9 12:50:06 ekl03yy postfix/smtp[11396]: 36F0F18DD5: to=<xxx@gmail.com>, relay=192.168.240.25[192.168.240.25], delay=24, status=sent (250 Message accepted for delivery)
Jul 9 12:50:06 ekl03yy postfix/qmgr[11198]: 36F0F18DD5: removed


i'm not allow to use user wwwrun.it should be another user.

1) how to change user from wwwrun@ekl03yy.zz.gov.my to userok@zz,gov.my


tq

gmail *accepted* your email. That is what status=sent (250 ...) means.

You can change the envelope sender by adding a 5th argument to mail():

"-f userok@zz,gov.my".

This argument is passed to sendmail, the actual program that places the mail in the postfix queue.

man sendmail for more info.

Thank you for help
Found the solution....

change user in /etc/postfix/sender_canonicle and update sender_canonicle.db

i did try the fifth arg but still not working...

Use a generics table instead of sender_canonical.