Re: spam removal

2004-02-16 Thread David Brinegar
Paul A. Hoadley wrote:
 Let's imagine that Charles gets a bounce notification, but it doesn't
 reach his threshold for doing anything more about it.  Bob loses
 legitimate mail.

Bounce messages are typically not good enough to avoid this.  The
other day a client tried to send an e-mail that exceeded my ISP's
limit and was told something like mailbox is full and had no idea
that the mailbox was empty but for their gigantic message.  Thank
you qmail.  Funny enough, they just assumed it was another of those
DNS blocks and had nothing to do with my mailbox, so I suppose
they've grown weary of these DNS blocked messages.

Another example is prodigy.net, which is spread out all over AOL and
SBC DSL and who knows what else.  When you send a message as a DSL
customer, it goes out of a random mailer on prodigy.net including
some that are DNS blocked by computers using the same network.  So
when you send mail to other prodigy.net users, you randomly get DNS
blocked.  The error message says that some.prodigy.net rejected a
message from another.prodigy.net, which is mystifying to say the
least.

So it is definitely over-used and misused.  But I must admit that
limited DNS blocking is great.  Like blocking dial-up users who send
directly instead of out the ISP's smtp server.  Spammers are sending
a lot of traffic from cracked dial-up computers, and this method
chops that off cleanly.  The trick is to make sure that the
rejection message is helpful to someone who might bother to read it.
A bunch of numbers and hello my name is qmail doesn't cut it.

-- 
David Brinegar
http://brinegar-computing.com
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Re: spam removal

2004-02-16 Thread David Brinegar
Gary defends qmail:
 It delivers a bounce called QSBMF, and to my knowledge is the only
 MTA that does.

Those messages are like idiot lights, without the brevity.  But
qmail is besides the point -- most bounce messages are pretty weak.
They work okay if the reader is computer literate.

I like the idea of referring to a web page, where you can make room
to properly explain things.  Especially for DNS blacklists, which
vary so much from group to group.

Who does it cost more to have long bounce messages?  ISPs or
spammers?  Anybody use tarpits with success? (eg. /usr/ports/spamd
or /usr/ports/qmail-ldap says it has a tarpit feature.)


-- 
David Brinegar
http://brinegar-computing.com
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Re: console pim? - what to use to track appointments

2004-02-04 Thread David Brinegar
Andrew L. Gould wrote:
 Schedule/Calendar - ???  Here's where I'm stumped.  cal will show
 me calendars when I need then; but I don't know what to use to
 keep track of meetings and other appointments.  calendar has lists
 of dates; but doesn't facilitate data entry and the format doesn't
 facilitate various fields of information (date, time, place,
 subject, contact, etc).  Does anyone have any suggestions?

at(1) works okay for me, along with a mailnote script which sends
a one-liner to my inbox or cell phone.

For example:

at 2:30pm
   mailnote meeting at 3pm


You might want wrappers to organize things the way you like.  I have
one to reorganize atq and at -c output so I can read my upcoming
notes or make sure the date is right on a job.  A few times I've
seen at 9am tomorrow turned into 9am two days from now, so it is
definitely funky.

-- 
David Brinegar
http://brinegar-computing.com
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