Не удалось вызвать функцию mail - Joomla 2.5: Общие вопросы

$params = sprintf("-oi -f %s", $this->Sender);

$params = '';

The original message was received at Tue, 28 Aug 2012 11:41:31 +0100
 from localhost.localdomain [127.0.0.1]

    ----- The following addresses had permanent fatal errors -----
 <hloonin@mail.ru>
     (reason: 550 Message was not accepted -- it contains invalid headers. More specially, 'From:' header must match user you are sending mail from. See http://help.mail.ru/mail-help/mailer/popsmtp for details.)

    ----- Transcript of session follows -----
 ... while talking to mxs.mail.ru.:
 >>> DATA
 <<< 550 Message was not accepted -- it contains invalid headers. More specially, 'From:' header must match user you are sending mail from. See http://help.mail.ru/mail-help/mailer/popsmtp for details.
 554 5.0.0 Service unavailable

Reporting-MTA: dns; rent-scaner.ru
 Received-From-MTA: DNS; localhost.localdomain
 Arrival-Date: Tue, 28 Aug 2012 11:41:31 +0100

 Final-Recipient: RFC822; hloonin@mail.ru
 Action: failed
 Status: 5.2.0
 Remote-MTA: DNS; mxs.mail.ru
 Diagnostic-Code: SMTP; 550 Message was not accepted -- it contains invalid headers. More specially, 'From:' header must match user you are sending mail from. See http://help.mail.ru/mail-help/mailer/popsmtp for details.
 Last-Attempt-Date: Tue, 28 Aug 2012 11:41:35 +0100