What is realtime black list(rbls)
RBLs uses the dns protocol to query the well-known IP addresses which have been complaint to send junk e-mail. Using RBLs to prevent the junk e-mail is very useful. RBLs is different with Anti-Spam service: RBLs blocks the junk e-mail based on the IP addresses; Anti-Spam service block the junk e-mail based on the message content. Using RBLs can save the resources of mail server.
Where can I find RBLs servers?
EmailArchitect server has several rbls servers set by default, but you can find
more rbls servers by the following url:
https://www.robtex.com/?blacklists=1.
Recommended RBLs Servers:
bl.spamcop.net
zen.spamhaus.org
cbl.abuseat.org
Trusted SPF records
Because RBLs is not 100% correct, so using this option can prevent rbls block the normal message.
First of all, please learn more detail about Sender Policy Framework (SPF) by the
following url:
http://www.openspf.org/
Therefore SPF is very good solutions to prevent faked email sender.
Because many spammers also set the SPF record, so do not put unknown domain to Trusted SPF/MX/A records.
Trusted IP Addresses
Put the following IP addresses to this list is recommended, it can prevent RBLs servers block the email from local LAN, Gmail and Hotmail:
Why RBLs blocks the local user to send email from dynamic IP addresses.
Now, more and more rbls servers list the dynamic IP addresses to prevent the bulk mailer to send junk e-mail. To let the local user to send email from dynamic IP addresses, the user must set the user authentication in e-mail client . If the user set the user authentication, the rbls will never block the connection.
Greylisting
Greylisting is a new weapon to use against spam in this great war being waged upon it. With this new shielding method, by which you may block out huge amounts of spam, you are sure to please your email clients!
To learn more detail about greylisting, please refer to http://www.greylisting.org/
By default, Greylisting is disabled in Emailarchitect Server, you can enable it in Web Access -> Services -> Realtime Black List -> have "Enable GreyList" checked and click "OK", and then Greylisting will be started. If this option is checked, even you stop "Realtime Black List" service, Greylisting still works except you disable it by having "Enable GreyList" unchecked.
Important Notice: Greylisting delays time to deliver the email to your local user. If you do not receive many junk emails, please do not enable it.
Trusted Sender
If the sender address is in user contacts or trusted email address, RBLS or Greylisting will never block the IP address/Sender.
See Also
Quick Tutorial User Permissions Domain Administration User Administration Services Administration SMTP Service POP3 Service IMAP4 Service Remote Object Call Service Webmail Service SSL Configuration Realtime Black List Anti-Spam Anti-Virus List Administration Traffic Control DBConnector Mail Archive DomainKeys and DKIM signature Storage and User Mailbox Incoming/outgoing Filters Advanced Functions in Filter Templates
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