• Allow Relay - If you are concerned about spammers using the relay function to send mail through your server, or do not want any other mail server to use your SMTP server as a gateway, set this to Nobody. (This is STRONGLY recommended.) However, you can set the type of relays you will allow, should you so desire.
  • Nobody - Restricts sent mail to only work via SMTP authentication and with accounts on the local SmarterMail Server (except for IPs on the White List).
  • Only Local Users - Limits relay access to users (email accounts) for a valid domain on your SmarterMail Server.
  • Only Local Domains - Limits relay access only to mail hosts (domains) on your SmarterMail Server.
  • Anyone - Allows any other mail server to pass messages through your mail server, increasing the chances of your mail server being used for sending large volumes of messages with domains not associated with your local mail server. Selecting this option turns off statistics for all domains, due to the high amount of messages that are passed through the mail server with an open relay.

Allow relay for authenticated users - This setting enables the "Allow Relay" setting when users are required to use SMTP Authentication for sending messages.