posts:postfix: also add a link for `relayhost`.

diff --git a/posts/Postfix.mdwn b/posts/Postfix.mdwn
index 5c28a0990a1f82255dfdad907e437edd3e5583b8..cc41e7dd15e812e5b97804bfe947e240fad4ca22 100644 (file)
--- a/posts/Postfix.mdwn
+++ b/posts/Postfix.mdwn
@@ -43,7 +43,7 @@ Test with:
 Here's what's going on:
 
 * You hand an outgoing message to your local Postfix, which decides to
-  send it via port `12345` on your localhost (`127.0.0.1`) (`relayhost`).
+  send it via port `12345` on your localhost (`127.0.0.1`) ([relayhost][]).
 * Stunnel picks up the connection from Postfix, encrypts everything,
   and forwards the connection to port 465 on `outgoing.verizon.net`
   (`stunnel.conf`).
@@ -102,6 +102,7 @@ see the [Postfix suggestions for being an MX host for a remote
 site][host].
 
 [Postfix]: http://www.postfix.org/
+[relayhost]: http://www.postfix.org/postconf.5.html#relayhost
 [myhostname]: http://www.postfix.org/postconf.5.html#myhostname
 [smtp_generic_maps]: http://www.postfix.org/postconf.5.html#smtp_generic_maps
 [postconf]: http://www.postfix.org/postconf.5.html