
Chapter 11. Configuration
will periodically fetch this mail and distribute it to individual POP mailboxes on the server. (Note that due to problems receiving mail for mailing
lists, we strongly encourage people to NOT use multi-drop e-mail.)
• If you are a ServiceLink subscriber, choose "Guaranteed e-mail" in order to activate the guaranteed e-mail services.
If you want to forward e-mail to another mail server for processing, enter the mail server IP address in the box marked Delegate mail server. A
common use for this is if your server is receiving inbound e-mail from the Internet, but you would like to pass that mail to a different mail server on
your internal network.
If you have a dialup connection, the server allows you to control how frequently it fetches e-mail from your ISP. This is particularly useful in
situations where you incur phone or Internet charges each time your system contacts your ISP. The default settings are every 15 minutes during
standard office hours and every hour outside normal office hours on weekdays or on weekends. The fields allow you to customize those settings.
Finally, if you have "multidrop" mail service you need to select the sort method used by the server to decide which user each message should be
delivered to. Your server has a default method for this (it examines various headers such as "To" and "Resent-To") which works in most
circumstances but is not suitable for certain purposes such as mailing list messages. Some ISPs add a header to each e-mail message which can help
your server determine the correct recipient. If your ISP does not add a header to multidrop e-mail, select the "Default" sort method and ignore the
"select sort header" field. If your ISP does add a header to multidrop e-mail, then select "Specify below" and enter the header tag provided by your
ISP. Because you will experience problems with mailing-lists when using multi-drop e-mail, we strongly recommend that you work with your ISP to
have a special header added to each message. The "Default" sort method should be only used as a last resort.
11.7. Other E-mail Settings
This screen presents you with additional options for controlling how your system handles e-mail.
• Forwarding address for administrative notices: The default address for administrative notices (i.e. undeliverable mail, backup notifications and
other status/error messages) is "admin". If you’d like those messages to be sent elsewhere, enter the address here.
Note: Be aware that all messages sent to postmaster, root or mailer-daemon at your domain are sent to either admin or the address that you
enter in this field.
• E-mail to unknown users: This field allows you to choose whether incoming messages to unknown users are bounced back to the sender or
forwarded to the system administrator. Some users prefer the latter setting because it allows them to catch and reroute e-mail that was incorrectly
addressed.
Note: If you choose to have messages forwarded to the system administrator, they will be sent to either "admin" or the e-mail address specified
in the forwarding address field mentioned above.
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