Welcome, confirmation, and some notification emails are sent using the PHP mail() function to prevent too many connections to the SMTP server. I suspect that PHP mail() is not working.
Here is a mail() test script:
<?php// config$domain = "domain.com";$toaddr = "test@listmailpro.com";// end config$fromaddr = "mytest@$domain";$returnpath = "bounceme@$domain";// codeecho date("l, F jS g:ia T");echo "<br>testing mail() function..<br>sending mail.. ";if(mail($toaddr,'mailtest','mailtest',"From: \"Mytest\" <$fromaddr>\nReturn-path: <$returnpath>")) echo "mail seems to be sent ok<br>"; else "mail NOT sent ok!?<br>";?>
Run a phpinfo() script to see if the "sendmail" variables are configured correctly - you may need to update your PHP.INI
<?php phpinfo(); ?>
Regards