What are the “Mail Relay” Options?
A simple way to think of the SMTP Relay Options is, “Require authentication from all users who send mail through this server to non-local addresses except …” For example, if ‘Relay for local users only’ is selected, then everyone must authenticate when sending mail to non-local addresses except for local users. A definition of each relay option is below. Note: Mail which is destined to local users on the IMail server does not need to be relayed. If any message which originates on a computer other than the IMail PC is to pass through the IMail server on its way somewhere else then IMail must relay the message. Typically, POP3 or IMAP mail clients on other work stations will send outgoing mail through an SMTP server (in this case, through IMail). In SMTP Security (IMail Administrator | localhost) you will probably want Relay for Addresses. List the IP addresses (and/or subnets) that you want to Relay Mail For. (It is necessary to stop and restart the SMTP service after the change. If y
