'body' => trim(qa_opt('mailing_body'))."\n\n\n".qa_lang('users/unsubscribe').' '.$unsubscribeurl,
'html' => false,
I would add a flag so we can use HTML too:
Furthermore I would use instead a plain URL: $unsubscribeurl a link so HTML can be used.
Seems that the $html flag would decide about the body unsubscribe link.
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