Email Filtering FAQ

Q	Which hosting plans are eligible for email [SPAM] filtering?
A	SPAM filtering is available on the advanced and preferred hosting plans. If you are currently not on one of these plans, filtering will be enabled when you upgrade your account to advanced or preferred hosting.
Q	How does the email filter work?
A	Our Mail Filters identify SPAM using the following RBL (Realtine Black List) Lists: relays.ordb.org - open relays based on submissions and tests sbl.spamhaus.org - known spam sources based on manual selection process spam.dnsrbl.net - spam sources collected using e-mail traps With our advanced email filter service, dangerous or offensive emails are also identified by scanning for invalid email headers and potentially harmful attachments. Other advanced features are available (see below).
Q	What features do I get?
A	We offer Basic SPAM Filtering and Advanced Email filtering, depending on your needs. See the descriptions below for further information about the features available with each service. Basic SPAM Filter Advanced Email Filter  Mail that comes to domains with enabled Advanced filtering gets higher scanning priority and is processed faster.
Q	What features are available in the Basic SPAM Filter?
A	The Basic Spam Filter is enabled on all preferred and advanced hosting plans by default. It includes SPAM identification using RBL Lists (Realtime Blackhole Lists) provided by three different sources: relays.ordb.org - open relays based on submissions and tests sbl.spamhaus.org - known spam sources based on manual selection process spam.dnsrbl.net - spam sources collected using e-mail traps When an email is identified as SPAM, the word [SPAM] is added to the subject line of the message. When you receive it you can then take action manually or you can set up rules in your email program to move it to another folder or delete it. In Basic Mode, Mail Filtering is set at the server level (for all domains and mailboxes on your account) only. You cannot set different settings for each mailbox. SPAM scanner sensitivity level is set to 5 and cannot be changed.
Q	What features are available in the Advanced Email Filter?
A	Mail that comes to domains with enabled Advanced filtering gets higher scanning priority and is processed faster. Advanced Mode Mail Filtering can be managed on both server (for all domains and mailboxes on your account) and mailbox levels. We can set the following settings: SPAM scanner sensitivity level from 1 to 10. The lower the number, the stricter the SPAM identifier rules. Choose to either add the ‘[SPAM]’ prefix to the Subject for SPAM messages (identified to be SPAM based on the sensitivity level you specified) and still deliver the messages to your mailbox or... reject such messages without delivering them to your mailbox. Enable/Disable “Scan for SPAM” option, which enables/disables anti-SPAM scanning. Enable/Disable rejecting messages with ‘bad’ mail headers. Enabling this option forces to reject e-mail messages with headers non-compliant with SMTP RFC-2821. ‘Bad’ headers can contain executable code and be used to infect client systems. Enable/Disable rejecting messages with dangerous attachments. The list of the dangerous attachments can be found here. Create server level White and Black lists affective for all the mailboxes on your account (The Black List provides you with the ability to create lists of senders that you never want to receive messages from again. Any email from sender whose email address is entered in the White List will never be considered as SPAM.) Disable/Enable Mail Filtering for individual mailboxes. When mail filtering is disabled, all filtering options are turned off for this mailbox with the exception of DNS RBL (Realtime Black List) which stays enabled at all times. Create mailbox level individual White and Black lists affective for edited mailbox only. Please note: Mailbox Level List rules always take priority over Server Level Lists rules.