SecExMail supports a number of privacy filter options. Incoming HTML messages may be converted from their native HTML format to plain text. The HTML filter is not enabled by default.
Check this option if you want SecExMail to convert incoming HTML messages to plain text messages. Enabling this filter is highly recommended as HTML mail may contain active components which in turn may be used to distribute viruses or stage malicious attacks on your computer. HTML email is especially dangerous, because malicious exploits may execute as soon as the email is being viewed and without your knowledge. Modifying this setting will have immediate effect.
Enabling this filter will not impact your ability to receive HTML attachments.