bzr_hookless_email configuration bug

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I ran into this bug using bzr_hookless_email, fortunately someone had published a patch which seems to have fixed the issue:

=== modified file 'bzr_hookless_email.py'
--- bzr_hookless_email.py 2012-03-22 15:15:15 +0000
+++ bzr_hookless_email.py 2012-04-25 06:05:55 +0000
@@ -159,7 +159,7 @@
         self._config = self._branch.get_config()

     def update(self):
- smtp = SMTPConnection(self._config)
+ smtp = SMTPConnection(self._branch.get_config_stack())
         smtp_from = None
         for revision in self._revisions_to_send():
             msg = self._compose_email(revision)

Error: post-commit hook failed (exit code 255) with no output

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In subversion I was getting the error “post-commit hook failed (exit code 255) with no output” after trying to configure my post-commit hook to send email notifications. At first I thought the problem must have been related to the mailer, but I ran the mail command manually and it worked fine. Eventually I figured out that the problem was that the hooks/post-commit file hadn’t been marked executable. So it was a simple chmod +x to fix the problem.

Binding Postfix to particular IP addresses

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I had a problem where my postfix mail system wasn’t listening on its IP address 10.1.1.123 but it was listening on 127.0.0.1. I checked my firewall settings and made sure port 25 was open, but I still couldn’t connect.

I read an article, Bind Postfix Mail Server To Localhost or Specific IP Address Only, which gave me the hint I needed.

The trick was to comment out inet_interfaces in /etc/postfix/main.cf because it was specifying loopback-only which meant postfix wasn’t listening on its other IP addresses.