Blank page after form submission

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I'm extending the external form. My form looks like this:
<form action="<?php echo $this->action('submit_form')?>" method="post">

where 'submit_form' is a function in the controller which sends an email. But when the form is submitted I get a totally blank white page.

Anyone know what's wrong? Thank you.

PS. If I use the controller code directly in the form file, everything works fine.

Ah, and I get this in the address after submission: "http://192.168.1.2/c5/index.php?cID=64&bID=45&arHandle=Main&ccm_token=1277133886:0812a5f730319cb62ac6fbabd426c9ef&btask=passthru&method=submit_form"

There are no error messages, no error logs, nothing.

linuxoid
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linuxoid replied on at Permalink Reply
linuxoid
It's all right, stupid me, it was just a typo in a variable name. It all works fine.

Although I wonder why there was no error?
clocktower replied on at Permalink Reply
clocktower
We have run into this issue if the SMTP Method is set to External SMTP Server under Dashboard > System & Settings > Mail > SMTP Method and the server is not properly configured to send and receive mail.