Incoming connections established via SMTP and the message flow can be easily managed using the established policies. Moreover, they allow adding headers, changing addresses and other such actions.
Received messages
Check the Limit message size option and then use the up and down arrows in order to specify the maximum size for received messages. Then use the drop-down menu to select one of the available options: bytes, KB, MB or GB as necessary. Maximum value: 4096 MB.
Use the up and down arrows or fill in the text box in order to specify the maximum number of received headers. This will result in denying looping emails when the number of received headers exceeds the specified value (30 in this example). Available values range from 1 to 999.
Check the Limit no. of recipients per message option in order to specify the maximum number of recipients for received emails. Fill in the text box or use the corresponding up and down arrows in order to set the specific value, between 1 and 1000.
Allowed ESMTP Commands
Specify the allowed ESMTP Commands using the options in this section. Enable the StartTLS, 8-bit MIME, binary or pipelining extensions by simply checking their corresponding boxes.
Allow/Disallow local delivery
Override default SMTP banner
Should you like to set a new SMTP banner check the box in front of the Override default SMTP banner option and then fill in the details of the new SMTP banner in the corresponding text box. The newly-added SMTP banner will automatically override the parameters of the default one.
When you are done configuring these parameters, remember to hit the Save Configuration button to preserve your changes.