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As one option, SX-GATE can refuse delivery to those addresses. But it is also possible
to send the respective emails to a certain internal or external email address. Here,
the same rules apply as as explained in the control above: If you specify an internal
address including a domain, the mappings defined on this screen will be applied to the
new target first. Omitting the domain part and thus specifying e.g. the name of a SX-
GATE group or mailbox, the mail will be delivered directly and processed according
to the configuration of the respective group or mailbox. Finally you can enter the
special target "*@DOMAIN", e.g. "*@example.com". In this case the domain part of
matching recipient address will be replaced by the specified new domain. The recipient
part before the "@" character remains unaltered. Use this feature if the mapping of a
previously defined domain can also be used by an other domain.
Please watch out for forwarding loops. Never forward an email
address direct or indirect to itself.
14.5.5-D
Mailrouting
E-Mails are usually forwarded to your provider's mail relay server or directly to the mail
server of the recipient. Mailrouting allows you to determine per recipient address to
which mail server SX-GATE has to forward an email.
Routing of specific recipient addresses
With entries in this area you can route emails for a specific recipient to a non-default
mail server. If necessary you can also change the recipient address. You will need two
entries for the same original recipient address to alter both, target server and recipient
address.
Entries on this tab have precedence over entries configured on
other tabs of this screen for the same recipient address.
To avoid mail loops you must make sure that the destination mail
server will not forward the mail so that it eventually returns to
SX-GATE.
In practice an entry here is only required if multiple mail servers keep the mailboxes for
a local domain. In a typical example SX-GATE polls the provider's POP server for local
emails. One user however has no access to SX-GATE and must poll the POP server
himself. If a local user tries to send an email to this external user, SX-GATE would try
to deliver this mail locally. An entry here allows you to forward mail for this recipient
to the Internet instead.
