Local Listener SMTP Service reference

My Identification
Domain
User Name
These values comprise your email address, that is User Name@Domain.
Acceptable additional incoming receiver usernames
Values recognized as valid To values by the VersaLexCleo HarmonyCleo VLTraderCleo LexiCom SMTP server. For these To values, the @Domain portion must be the same as specified in the Domain field.  Cleo Harmony and Cleo VLTrader applications only.
Return-Path
Optional - specify an email address or server to which you would like to send any responses, including bounced messages and error messages. The value must be specified as User Name@Domain. For the Cleo LexiCom application, the Return-Path must be entered to designate the server to receive any responses or error message. The value must be specified as user@domain
Perform reverse DNS lookup
Cleo Harmony and Cleo VLTrader applications only. Select Perform reverse DNS lookup if you would like to verify the source domain name of an incoming email. 
Allow VERIFY command
Cleo Harmony and Cleo VLTrader applications only. Deselect Allow VERIFY command if you do not want your trading partners to be able to specifically verify your email address. 
Case sensitive usernames
Cleo Harmony and Cleo VLTrader applications only. Deselect Case sensitive usernames if you want to allow your trading partner's incoming email username verification to not be upper/lowercase dependent. 
DSNs Storage Folder
Cleo Harmony and Cleo VLTrader applications only. If desired, change the location of the DSNs Storage Folder. This folder stores Delivery Status Notifications (DSNs). By default this directory is pre-defined to be a subdirectory under the Cleo HarmonyCleo VLTraderCleo LexiCom directory tree. To change the location:
  1. Click the ... button.
  2. Specify the new path using the directory chooser.
  3. Click Apply.
Retain Message ID History
Cleo Harmony and Cleo VLTrader applications only. If desired, change the number of days to Retain Message ID History. The default is 5 days. This setting is used to check for duplicate messages from your trading partners.