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Activating TLS on outbound email streaming
The TLS is a security protocol for exchanges on the Internet. Activating the TLS on the email
streaming turns on encryption of outbound SMTP connections.
TLS Mode:
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The “permissive” mode makes the MailCube adaptative to the recipient’s server. If the
recipient’s server is compatible with TLS, MailCube sends emails using an encrypted
connection. If not, the MailCube sends emails using a normal connection.
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The restrictive mode allows sending emails only when the recipient’s server is compatible with
TLS. This restrictive mode can be applied only for a list of domain names.
Figure 5-5
Access to the security settings interface (Outbound TLS)
Domain declaration interface
Declaring domains will allow MailCube to intercept e-mails you wish to filter. The appliance will
analyze received traffic, apply the configured actions and send the remaining e-mails to the defined e-
mail server. Figure 5-5 shows the domain administration interface.
Figure 5-5
Domain configuration interface
Be carefull
, by activating TLS on outbound streaming, it is mandatory to set up a certificate. Without
any certificate and the TLS activated, the outbound streaming doesn’t work.
