CODE:
$from = $_GET['from'];
$to = $_GET['to'];
$headers = "From:" . $from;
mail($to, 'PHP mail() function', 'Coming from PHP mail() function', $headers);
echo 'Check your inbox for PHP mail() function';
Code above used to work for sending local emails but not anymore. Only works for sending external email. Also, swift_emailer() doesn't work either.
MORE DETAILS:
Located at:
/usr/sbin/sendmail
phpinfo() output:
sendmail_path /usr/sbin/sendmail -t -i /usr/sbin/sendmail -t -i
MAIL LOG:
Mar 21 12:18:27 database sendmail[15156]: r2LCEFfB015154: to=<myaddress@whateveritis.com>, ctladdr=<apache@localhost.localdomain> (48/48), delay=00:04:12, xdelay=00:04:12, mailer=esmtp, pri=120357, relay=mx00.1and1.co.uk. [212.227.15.134], dsn=5.0.0, stat=Service unavailable
Mar 21 12:18:27 database sendmail[15156]: r2LCEFfB015154: r2LCIRfB015156: DSN: Service unavailable
Mar 21 12:18:27 database sendmail[15156]: r2LCIRfB015156: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31619, dsn=2.0.0, stat=Sent
Mar 21 12:18:32 database sendmail[15162]: r2LCENGr015160: to=<myaddress@whateveritis.com>, ctladdr=<apache@localhost.localdomain> (48/48), delay=00:04:09, xdelay=00:04:08, mailer=esmtp, pri=120356, relay=mx01.1and1.co.uk. [212.227.17.175], dsn=5.0.0, stat=Service unavailable
Mar 21 12:18:32 database sendmail[15162]: r2LCENGr015160: r2LCIWGr015162: DSN: Service unavailable
Mar 21 12:18:32 database sendmail[15162]: r2LCIWGr015162: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31618, dsn=2.0.0, stat=Sent
Mar 21 12:18:50 database sendmail[15166]: r2LCEk12015164: to=<myaddress@whateveritis.com>, ctladdr=<apache@localhost.localdomain> (48/48), delay=00:04:04, xdelay=00:04:04, mailer=esmtp, pri=120357, relay=mx01.1and1.co.uk. [212.227.15.134], dsn=5.0.0, stat=Service unavailable
Mar 21 12:18:50 database sendmail[15166]: r2LCEk12015164: r2LCIo12015166: DSN: Service unavailable
Mar 21 12:18:50 database sendmail[15166]: r2LCIo12015166: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31619, dsn=2.0.0, stat=Sent
Mar 21 12:19:39 database sendmail[15229]: r2LCJcKD015229: from=apache, size=123, class=0, nrcpts=1, msgid=<201303211219.r2LCJcKD015229@localhost.localdomain>, relay=apache@localhost
Mar 21 12:19:39 database sendmail[15230]: r2LCJdfM015230: from=<apache@localhost.localdomain>, size=357, class=0, nrcpts=1, msgid=<201303211219.r2LCJcKD015229@localhost.localdomain>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Mar 21 12:19:39 database sendmail[15229]: r2LCJcKD015229: to=myaddress@whateveritis.com, ctladdr=apache (48/48), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30123, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (r2LCJdfM015230 Message accepted for delivery)
Have you checked with your hosting company to see if they implemented an internal mail system on the server? Something that would be catching the mail and delivering it locally and not letting it leave the server? If you check your directory, it's oftentimes a folder like //Mail or something similar.