Configuring message properties

Administrator Help | TRITON AP-EMAIL | Version 8.2.x

Email message control properties allow you to set message size and volume limits, and determine how invalid recipients are handled. Select Settings > Inbound/Outbound > Message Control to configure the following settings:

Setting size properties

Setting volume properties

Configuring invalid recipient settings

Enabling archive message options

Enabling message sender verification

Enabling bounce address tag validation (BATV)

Click OK when you finish setting message properties.

Setting size properties

Use the Message Size Options to configure message size properties:

Select Limit message size (default setting) if you want to set a maximum message size.

Enter a maximum message size in the corresponding Maximum message size (KB) field, from 1 - 102400 (default is 10240). This setting can prevent very large messages from using valuable bandwidth.

Select Limit data size per connection if you want to set a maximum message size per connection.

Enter a maximum data size in the corresponding Maximum data size (KB) field, from 1 - 204800 (default is 20480). This setting can help limit the receipt of messages with very large attachments, which can take up valuable bandwidth.

Setting volume properties

Use the Message Volume Options to configure message volume properties:

Select Limit number of messages per connection to enable that option.

Enter a maximum number of messages per connection in the associated Maximum number of messages field, from 1 - 65535 (default is 30).

Select Limit number of recipients per message to enable that option.

Enter a maximum number of recipients in the corresponding Maximum number of recipients field, from 1 - 4096 (default is 20). This can save bandwidth by preventing one message from being sent to hundreds of users.

Configuring invalid recipient settings

Use the Invalid Recipient Options to configure invalid recipient settings:

Mark the Allow invalid recipients check box if you want to permit mail containing invalid recipients into your system. This option is available only when the recipient validation is used (see Settings > Users > User Authentication).

Enter a value for the percentage of invalid recipients that determines if a message is blocked (default is 100).

Mark the appropriate check box to enable the system to send a non-delivery report (NDR) notification only if a message is not blocked.

Enabling archive message options

Mark the Enable archive queue storage check box if you want all incoming messages saved to an archive message queue before they are scanned. You should note that enabling this feature can impact storage capacity and system performance. This option is disabled by default.

View the archive queue by clicking archive in the queue list on the Main > Message Management > Message Queues page.

Enabling message sender verification

Ensure that an internal email sender is an authenticated user by enabling the internal sender verification function. This operation performs a check to confirm that an email sender from an internal domain is also an authenticated user. For email to pass this check function, a mail sender's address must match the sender's log in authentication entry.

Mark the Enable internal sender verification check box in the Internal Sender Verification section to activate this function. By default, this function is disabled.

Enabling bounce address tag validation (BATV)

Bounce address tag validation (BATV) is a method for determining whether a bounce message to an address in your protected domain is valid. This method helps to prevent backscatter spam, in which a bounce message to your organization contains a forged recipient address.

With BATV enabled, the sender address of outbound email is marked with a unique tag. A bounce message addressed to that sender is examined for the presence of that unique tag. If the tag is detected, the bounce message is cleared for delivery. A bounce message without the tag is blocked.

Enable BATV in the Settings > Inbound/Outbound > Message Control page. Mark the Enable Bounce Address Tag Validation check box in the Bounce Address Tag Validation section.

You may want mail from some user and IP address groups to bypass the BATV function. These groups can be defined in the Bounce Address Tag Validation section. Select a group from among the following drop-down lists:

Inbound IP address group

Inbound domain group

Outbound domain group

Note that a domain group selected for outbound bypass must also be selected for inbound bypass.

The default setting for each group is None. Only user-defined domain and IP address groups are available in the drop-down lists. See Managing domain and IP address groups for information about creating domain and IP address groups.