HELP: mail() not working!

[tapsemi]

My PHP mail() function is now working!
System Info: Running PHP on webserver running Apache, Postfix(for SMTP) and running on CentOS linux. SMTP is working because I can do telnet localhost 25.

My phpinfo() webpage gives the following information:
-----------------
.
sendmail_from no value no value
sendmail_path /usr/sbin/sendmail -t -i /usr/sbin/sendmail -t -i
SMTP localhost localhost
smtp_port 25 25
.
-----------------------

What do you think is the problem or how can I fix it? Any clues/links is highly appreciated. I am totally frustrated now.

[Ben]

so if mail() is not working, the return value of mail() should be false.

To check why mails are not leaving your server, please check the mail logs in /var/log to see what happens while you try to send an email via mail().

[tapsemi]

I did a tail of the /var/log/maillog. Here are the lines that were generated after I tried to execute the mail script:
(I replaced my real domain name with mydomain.com here)

--------------------------------------

Apr 4 07:04:08 75-126-255-51 postfix/pickup[9377]: CC931CF006B: uid=48 from=<apache>
Apr 4 07:04:08 75-126-255-51 postfix/cleanup[19815]: CC931CF006B: message-id=<20080404070408.CC931CF006B@mydomain.com>
Apr 4 07:04:08 75-126-255-51 postfix/qmgr[13998]: CC931CF006B: from=<apache@mydomain.com>, size=641, nrcpt=1 (queue active)
Apr 4 07:04:08 75-126-255-51 postfix/local[19817]: CC931CF006B: to=<services@mydomain.com>, relay=local, delay=0.04, delays=0.03/0/0/0.01, dsn=5.1.1, status=bounced (unknown user: "services")
Apr 4 07:04:08 75-126-255-51 postfix/cleanup[19815]: D2BC9CF006C: message-id=<20080404070408.D2BC9CF006C@mydomain.com>
Apr 4 07:04:08 75-126-255-51 postfix/qmgr[13998]: D2BC9CF006C: from=<>, size=2306, nrcpt=1 (queue active)
Apr 4 07:04:08 75-126-255-51 postfix/bounce[19818]: CC931CF006B: sender non-delivery notification: D2BC9CF006C
Apr 4 07:04:08 75-126-255-51 postfix/qmgr[13998]: CC931CF006B: removed
Apr 4 07:04:08 75-126-255-51 postfix/local[19817]: D2BC9CF006C: to=<root@mydomain.com>, orig_to=<apache@mydomain.com>, relay=local, delay=0.01, delays=0/0/0/0.01, dsn=2.0.0, status=sent (delivered to maildir)
Apr 4 07:04:08 75-126-255-51 postfix/qmgr[13998]: D2BC9CF006C: removed
----------------------------------------

What can we infer from this log file? One more thing, the mail() script is trying to send an email to services@mydomain.com address. It seems to me from this log that the email id services@mydomain.com doesn't exist, however it is not true. I can send email to this address from any normal mail service.

[falko]

Does the services@mydomain.com account exist on that server?