diff --git a/src/messenger/webim/libs/notify.php b/src/messenger/webim/libs/notify.php
index 95fda855..08d2da8c 100644
--- a/src/messenger/webim/libs/notify.php
+++ b/src/messenger/webim/libs/notify.php
@@ -45,7 +45,13 @@ function mibew_mail($toaddr, $reply_to, $subject, $body, $link)
 	$body = preg_replace("/\n/", "\r\n", $body);
 
 	log_notification($current_locale, "mail", $toaddr, $subject, $body, null, $link);
+
+	$old_from = ini_get('sendmail_from');
+	ini_set('sendmail_from', $mibew_mailbox);
 	@mail($toaddr, $real_subject, wordwrap(myiconv($mibew_encoding, $mail_encoding, $body), 70), $headers);
+	if (isset($old_from)) {
+		ini_set('sendmail_from', $old_from);
+	}
 }
 
 function mibew_xmpp($toaddr, $subject, $text, $link)