Postfix Overview - Introduction - SCN Research
Postfix Overview - Introduction - SCN Research
Postfix Overview - Introduction - SCN Research
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hostname.my.domain<br />
localhost.my.domain<br />
local:<br />
local:<br />
Page 2 of 3<br />
The interpretation of the nexthop field is transport<br />
dependent. In the case of SMTP, specify host:service for a<br />
non-default server port, and use [host] or [host]:port in<br />
order to disable MX (mail exchanger) DNS lookups. The []<br />
form can also be used with IP addresses instead of hostnames.<br />
EXAMPLES<br />
In order to send mail for foo.org and its subdomains via<br />
the uucp transport to the UUCP host named foo:<br />
foo.org<br />
.foo.org<br />
uucp:foo<br />
uucp:foo<br />
When no nexthop host name is specified, the destination<br />
domain name is used instead. For example, the following<br />
directs mail for user@foo.org via the slow transport to a<br />
mail exchanger for foo.org. The slow transport could be<br />
something that runs at most one delivery process at a<br />
time:<br />
foo.org<br />
slow:<br />
When no transport is specified, the default transport is<br />
used, as specified via the default_transport configuration<br />
parameter. The following sends all mail for foo.org and<br />
its subdomains to host gateway.foo.org:<br />
foo.org<br />
.foo.org<br />
:[gateway.foo.org]<br />
:[gateway.foo.org]<br />
In the above example, the [] are used to suppress MX<br />
lookups. The result would likely point to your local<br />
machine.<br />
In the case of delivery via SMTP, one may specify hostname:service<br />
instead of just a host:<br />
foo.org<br />
smtp:bar.org:2025<br />
This directs mail for user@foo.org to host bar.org port<br />
2025. Instead of a numerical port a symbolic name may be<br />
used. Specify [] around the hostname in order to disable<br />
MX lookups.<br />
The error mailer can be used to bounce mail:<br />
error:mail for *.foo.org is not deliv-<br />
.foo.org<br />
erable<br />
This causes all mail for user@anything.foo.org<br />
bounced.<br />
to be<br />
REGULAR EXPRESSION TABLES<br />
This section describes how the table lookups change when<br />
the table is given in the form of regular expressions. For<br />
a description of regular expression lookup table syntax,<br />
see regexp_table(5) or pcre_table(5).<br />
Each pattern is a regular expression that is applied to<br />
http://www.porcupine.org/postfix-mirror/transport.5.html<br />
6/26/01
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