Configuring an email External Relay

Configure->LocalConfig->ExternalRelay

Although the Server is capable of delivering email directly to a recipient's mail server, in many cases it makes sense to not do this, but to send it to a local mail relay and ask it to do the remote delivery for you. There are two main reasons to adopt this approach:
 

- sending the mail to a distant destination can be a slow and error prone process, which can result in considerable extra time spent on-line.  This has a direct bearing on cost for most dial-up links.
- some mail destinations will not accept email originating from a server on a dial-up IP address, considering it to be a potential source of 'spam'. Delivering via a mail relay which does not use a dial-up IP address avoids this issue.

This field normally contains the name of the SMTP server of your ISP, or the name of a private mail relay if your organization has one.  If you do not want to use an external mail relay, this field should be left blank.