Accepting e-mails regardless of the domain they have been sent
This article explains how to accept all incoming
e-mails regardless of the domain they have been sent to.
If it is necessary to accept all inbound mail traffic regardless of
the domain they have been sent to, do as follows:
Insert a dot (.) to the
Mail for Host / Domain
Keep the Mailer as the default ("ESMTP") unless your e-mail server
requires "SMTP". See the note below about security issues.
Type in the actual mail server IP address or DNS name to the
Route to Host(s) / Domain(s) field.
If necessary, change the
Lookup By and
Delivery Type settings to match your
Save Changes to finish the configuration.
In this way all the domains receiving e-mails in your organization do
not need to be inserted into the Inbound Mail Relay table.
Note: Make sure that your actual e-mail server treats all the e-mails
coming from your F-Secure Messaging Security Gateway IP address as inbound
traffic if you configure the product as described here. Also, do not select DNS
in the Mailer table because there is a risk of opening your e-mail server or
F-Secure Messaging Security Gateway to act as an open SMTP relay which can be
accessed from the Internet by spammers.