Prodigy Infinitum, SMTP through port 25, botnets and such
Wednesday, December 26th, 2007
After pulling my hair for a couple of days I just realized that my DSL provider is blocking all outgoing connections to port 25 with an ICMP Unreachable packet, which translates as a totally bogus “no route to host” message (An ICMP RST would be more kosher, BTW). The only explanation that comes to my mind is that Telmex has finally realized that it has become one of the largest botnet hosts in the world and decided to do something about it. This is a terrible inconvenience for me, because I run a backup MX at my home office and all the email I write while I’m at home is relayed through it. And now it believes that it has been cut out from the Internet, and is suffering from Internet withdrawal syndrome. Oh, and all attempts to use an external relay -like my primary MTA or the office’s- through port 25 fail as well, so I have had to set up an elaborate workaround *just to send email*.
*Argh!* I hate to pay up for those ignorant Windows home users.
Add to that the fact that i get 800KBps tops in a 2GBps line, and recurrent reports of arbitrary bandwidth capping and Infinitum stops looking like a good alternative for home broadband. I’ll have to look for a cost-effective alternative, but after experiencing 20MBps/20EUR in Europe I’m afraid that I’ve been spoiled for life.
In the meantime, if you were expecting a mail from me in the last five days or so, I’m sorry to say that it is either on its way or lost forever.
Anyway… Merry Christmas!
Update 20080104: AJ Gibson points out in a comment that Telmex is willing to remove the block from your account if you are willing to jump through a few hoops. Just go to http://www.telmex.com/mx/asistencia/correoelectronico/faq_puerto_25.html and follow the instructions there. I registered yesterday and today I can connect back to external SMTP servers again. As mentioned in the comments, YMMV.
After flickering in-and-out for a few weeks and then getting a misterious red tint, the IBM Thinkpad R50’s display got well for a couple of months before getting all flickery again and dying for good. It was the nicest display you could find in any laptop of its class, even tough it is rather opaque and has its share of glare. I called IBM Tech Support and they told me that I could send it to Guadalajara for service after paying USD$70 for shipping and diagnostics (the backlight’s out, what else is there to diagnose?). I called IBM Guadalajara and was told that I had to pay over USD$100 instead, which I paid up anyway. Then they promptly proceeded to lose my service order for a month, time in which apparently IBM finally managed to kick out Lenovo employees from their Guadalajara offices. After calling their new number repeatedly, I got in touch with them and they finally managed to ship me a prepaid box to send the laptop out.















