East of the Sun, West of the Moon

2004/10/8

User unknown

Filed under: Software — Erwin @ 4:33 pm

M was trying to send an email reply to someone for something related to school and the email bounced. Second attempt two days later, because there’s always the chance someone’s mailbox is overflowing and the mail-server gives an inconsistent reply, bounced as well. Meanwhile she received a phonecall from the person who wanted to know if M got the original email, since not everybody checks their email as often, so clearly the other person thinks the address is perfectly valid. Let’s have a look at what happens if I replay the SMTP manually:

$ telnet their.mail.server 25
Trying their.ip.num.ber...
Connected to their.mail.server.
Escape character is '^]'.
220 some.mail.server Mark's SMTP Server ready
HELO my.host.name
250 some.mail.server
MAIL FROM:<my@email.address>
250 OK
RCPT TO:<someone@over.there>
550 User unknown 68.103.25.230
QUIT
221 some.mail.server closing session
Connection closed by foreign host.

That’s odd, why is my ipaddress there? On a hunch, I tell our SMTP server to send email for this domain through our ISP and ask M to send it again. Lo and behold, it works this time, no bounce, and within minutes we even have a reply!

The hunch I had is that some.mail.server uses one of the DNS based Dynamic IP blocklists which means that it won’t accept email from addresses that are considered dialup, DSL, or cable ipaddresses. That’s fine, with the amount of spam going around I can forgive them for that and for this very reason I’ve got a series of domains where I know they use such a blocklist set up to go through my ISP, so that it arrives afte rall. But if you do this, could you at least have the bleeding decency to indicate this in the freaking error message? That’s there for a reason, you know? So that people like me can figure out what’s going on and adjust their setup instead of getting caught in the crossfire of the spam-wars. You don’t actually think spam software looks at what it says behind that 550 number, do you? (In fact, I’m pretty sure they ignore the result code altogether, given how dead addresses keep receiving attempts to deliver fresh spam day in day out.) With so many million messages being sent out, that’s about as likely as world peace.

Reality vs. Fiction

Filed under: News — Erwin @ 3:30 pm

Damnit. This had me fooled for a minute until I started reading the comments on Fark (where it was submitted today) that went with the entry. The deal is that CNNNN is (or was, rather) a satire show on Australian TV and the article is in fact just under a year old.

The scary part is that I didn’t realize it was a fake until, feeling upset and angry and writing a slightly differently toned entry for the blog, I checked the comments to see what others thought of it. With shows like Fear Factor that do exactly this facing your fears type of thing, this just sounded a bit too realistic and I didn’t notice the parts that I would have realized to be absurd under normal circumstances. Remind me again why people continue to watch reality TV? 🙁

Can you hear me now?

Filed under: News — Erwin @ 12:40 pm

From CNN:

Seeking to avoid a repeat of the scowls that contributed to negative reaction to his appearance in the first prime-time matchup, the president has watched tapes of the encounter.

I wonder if he also noticed the bulge on his back and what his explanation for it is. 🙂

What’s the capital of Paris?

Filed under: General — Erwin @ 9:55 am

You read those news articles from time to time, about how kids these days have no sense of geography. Here’s your chance to show that you are better than them!

Powered by WordPress