Browsing Lakota translation

57.

**None**: No anti-spam checks are performed on form submissions.

58.

**Simple**: Some basic checks are performed. Form submissions with email addresses that are not well-formed or that have an excessive number of URLs are rejected.

59.

**Advanced**: Performs additional checks to determine whether email addresses are real or contain URLs that are blacklisted. This requires an Internet connection.

60.

**Enable Spamhaus URL blacklist**: If enabled, URLs will be checked against the Spamhaus DNSBL. The `Spamhaus Project <http://www.spamhaus.org>`_ provides a URL blacklist that is free for non-commercial, low-traffic use. A professional use datafeed service is also available but not supported in Mahara. Please read the `Spamhaus DNSBL usage terms <http://www.spamhaus.org/organization/dnsblusage.html>`_ before enabling this option.

61.

**Enable SURBL URL blacklist**: If enabled, URLs will be checked against the SURBL DNSBL. `SURBL <http://www.surbl.org>`_ provides a URL blacklist that is free for organizations with fewer than 1000 users. A professional use datafeed service is also available, but not supported in Mahara. Please read the `SURBL usage terms <http://www.surbl.org/usage-policy.html>`_ before enabling this option.

62.

**Disable external resources in user HTML**: Turning this option on will prevent users from embedding external resources such as images from remote sites into their forum posts and other HTML content. It is however a good thing to do from a security standpoint since it does neutralise a few clever phishing attacks. See the `HTML Purifier documentation <http://htmlpurifier.org/live/configdoc/plain.html#URI.DisableExternalResources>`_ for more details.

63.

Proxy settings

64.

**Proxy address**: If your site uses a proxy server to access the Internet, specify the proxies in ``hostname:portnumber`` notation.

65.

**Proxy authentication model**: Select your proxy's authentication model (none or basic [NCSA]), if appropriate.

66.

**Proxy credentials**: Enter the credentials required for your proxy to authenticate your web server in ``username:password`` format.