3Com 3CR3MFA-92 User Manual page 20

20 C 2: C
HAPTER ONFIGURING
M D
AIL ELIVERY
Route-to — Enter the address for the mail server to which mail will be
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delivered. This is your local mail server, such as a Microsoft Exchange
mail system.
MX — (Optional) Select the MX check box if you need to look up the
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mail routes in DNS before delivery. If this is not enabled, MX records
will be ignored. Generally, you do not need to select this item unless
you are using multiple mail server DNS entries for load
balancing/failover purposes. By checking the MX record, DNS will be
able to send the request to the next mail server in the list.
KeepOpen — (Optional) Select the KeepOpen check box to ensure
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that each mail message to the domain will not be removed from the
active queue until delivery is attempted, even if the preceding mail
failed or was deferred. This setting ensures that local mail servers
receive high priority.
The KeepOpen option should only be used for domains that are usually
very reliable. If the domain is unavailable, it may cause system
performance problems due to excessive error conditions and deferred
mail.
A list of domains can also be uploaded in one text file. The file must
contain comma or tab separated entries in the form:
[domain],[route],[port],[ignore_mx],[subdomains_too],[keep_open]
For example:
example.com,10.10.1.1,25,on,off,off
domains.csv
The file (
Notepad or other Windows text editor. It is recommended that you
download the domain file first by clicking Download File, editing it as
required, and uploading it using the Upload File button.
) should be created in csv file format using Excel,