SMTP Agent: UBE Relaying
You can keep your NIMS system from
relaying UBE (unsolicited bulk email) or spam messages.
Provide the SMTP Agent UBE relaying
settings > click Apply to save the settings.
Flags
Do SMTP-after-POP
Prohibits anyone from sending messages through the SMTP Agent
until they have first authenticated with the your NIMS system by
way of their POP3 or IMAP4 client within a designated time
frame. This works for most Internet email clients because they
always check for email (log in) just before sending messages.
This option requires that you run the Connection Manager to
perform the user authentication.
Allow Remote Sending for
Authenticated Users Only Enables SMTP authentication.
If selected, the email client must authenticate to the SMTP
Agent before the agent will relay its remote messages. Netscape
Communicator and Outlook Express support SMTP authentication or
an allowed list.
If SMTP-after-POP and SMTP
Authentication are both enabled, they function as an either/or
option. If an email client does not authenticate by way of POP
when downloading mail, it must authenticate by way of SMTP
before it can send remote messages.
Require Sender to be in
Allowed List Restricts access to your NIMS system by
selectively allowing access. If selected, only mail hosts with
an IP address designated in the Allowed Hosts list can relay
remote messages through this SMTP Agent. The Allowed Hosts list
is defined below.
Maximum Number of Recipients
per Email Restricts the number of users who can receive
the same message.
Allowed Hosts Type a
list of allowed IP address ranges, with one address per line. If
Require Sender to Be in Allowed List is selected above, only the
hosts that fall within the designated IP address ranges can relay
remote messages through the current SMTP Agent.
Relayed Domains (ETRN)
Provide a list of domain names. NIMS will relay messages addressed
to one of these domains regardless of any UBE settings. This feature
is used in conjunction with the ETRN SMTP extension. A mail server
that is not permanently connected to the Internet cannot receive mail.
An ETRN host will accept mail for one of these dialup systems and hold
it until they request it via the SMTP ETRN command. In such a scenario
it is neccessary to point the DNS MX record with the lowest preference
to the dialup server’s IP address, and another DNS MX record with a higher
preference number to the NIMS system that is acting as relay. |