HTML forms

Found a cool series of articles: How to Build HTML Forms Right. Only the first two of five articles have been published so far, but I’m looking forward to the next three. The articles are about how to do forms right in HTML 5.

The articles are rich with links, click through for heaps of info. Some things that I found:

Adding a sender blacklist to Postfix

Here at ProgClub, as moderator for our mailing lists, I get a bunch of spam that I have to get rid of every day, to keep our lists sparkling and spam-free. I regularly get spam from senders from, and I wanted to add their entire domain to a blacklist on our mail server… I hadn’t configured a Postfix blacklist before, so I did a little research and came up with this:

I created a file /etc/postfix/sender_access like this: REJECT

Then I created the access database:

# postmap /etc/postfix/sender_access

Then I added the sender restrictions into /etc/postfix/

smtpd_sender_restrictions =
  check_sender_access hash:/etc/postfix/sender_access

Then I restarted postfix and was done! Everything is easy when you know how.

For reference, here is the doco which I read to help me: