Mail from php with qvcs

Hi! I succesfully instaled qvcs Qmail-Vmailmgr-Courier-SquirrelMail on my RH72 system. I can send mail from webmin interface. I work also with php pages.In the past, with sendmail, i used function: mail($to, $subject, $message, $headers) for sending mail from web page; How to use this function with qvcs(an example), or another function for sending mail from php web page? Tx in advance for any help Adi PS: 1.i made: ln -s /var/qmail/bin/sendmail /usr/lib/sendmail ln -s /var/qmail/bin/sendmail /usr/sbin/sendmail but didn't work 2In var/log: When i try to send from php page with mail() function: 1.399722 info msg 536466: bytes 219 from <root@.> qp 6905 uid 0 Jun 17 16:44:01 server qmail: 1024321441.405085 starting delivery 190: msg 536466 to remote adipublic@home.com Jun 17 16:44:01 server qmail: 1024321441.405156 status: local 0/10 remote 1/2 Jun 17 16:44:01 server qmail: 1024321441.442691 delivery 190: failure: Connected_to_193.231.236.41_but_sender_was_rejected./Remote_h ost_said:_553_sorry,_your_envelope_sender_domain_must_exist_(#5.7.1)/ When i try to send mail from squirrelmail webmail page is working: new msg 536466 Jun 17 16:38:21 server qmail: 1024321101.074712 info msg 536466: bytes 759 from <adrian@mydomain.ro> qp 6798 uid 502 Jun 17 16:38:21 server qmail: 1024321101.091053 starting delivery 186: msg 536466 to remote adipublic@home.com Jun 17 16:38:21 server qmail: 1024321101.091141 status: local 0/10 remote 1/20 Jun 17 16:38:21 server imapd: LOGOUT, user=adrian, ip=[::], headers=0, body=0 Jun 17 16:38:21 server qmail: 1024321101.275389 delivery 186: success: 193.231.236.41_accepted_message./Remote_host_said:_250_ok_102 4321188_qp_23810/