29 junio 2007

Spam, spammers, catch-all y la madre que los parió

Resulta que hoy he tenido la suerte que algún spammer (o varios a la vez, esto es una plaga), han decidido mandar una oleada de spam masivo con la dirección de remite loquesea@silvotec.com, por lo que llevo desde esta mañana recibiendo oleadas masivas de respuestas de los filtros antispam y los servidores de correo de medio mundo (creo que debo llevar cerca de 500 mensajes devueltos).

Esta es una vista del Outlook esta tarde...



Los mensajes devueltos tienen el estilo de....

Hi. This is the qmail-send program at mail1.sanimail.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

:
207.235.125.31 does not like recipient.
Remote host said: 511 sorry, no mailbox here by that name (#5.1.1 - chkuser) Giving up on 207.235.125.31.

--- Below this line is a copy of the message.

Return-Path:
Received: (qmail 6225 invoked by uid 1012); 29 Jun 2007 14:44:35 -0000
Received: (qmail 6202 invoked from network); 29 Jun 2007 14:44:35 -0000
Received: from unknown (HELO mx1.sanimail.com) (207.235.126.33)
by mail1.sanimail.com with SMTP; 29 Jun 2007 14:44:35 -0000
Received: (qmail 77574 invoked from network); 28 Jun 2007 15:57:00 -0000
Received: from wyfsilvotecsum@silvotec.com by mx1.sanimail.com
X-SaniMail-Spam: score=1
Received: from unknown (HELO daniel-31j4m2jd) (84.40.191.180)
by mx-pharm.sanimail.com with SMTP; 28 Jun 2007 15:56:00 -0000
Received: from 62.193.206.49 (HELO mxav.silvotec.com)
by velocitywest.com with esmtp (4(G5-<09)=02>
X-Mailer: The Bat! (v3.0) Professional
X-Priority: 3 (Normal)
Message-ID: <674415925.97520143202822@thhebat.net>
To: qerwinwv@velocitywest.com
Subject: Anatrim will change your life
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="----------8FB098F4D35DA9"
X-Spam: Not detected

------------8FB098F4D35DA9
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

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Como queda claro, aunque el mensaje lo envie mecagoentusmuelas@putoespamer.com, al figurar como remitente el dominio de la empresa, todas las respuetas avisando de que deje de mandar spam, de que fulanito está de vacaciones o que ya no trabaja allí me llegan a la dirección de retorno.

Al tener configurado en el servidor de entrada que todos los e-mails dirigidos a loquesea@silvotec.com me los reenvíe a la cuenta principal, pues ..... avalancha.

Ahora diréis, ¿porqué no quitas el catch-all?... buena pregunta, si no fuera porque tenemos bastantes clientes que mandan los e-mails a la primera dirección que se les ocurre, claro, y luego no es cuestión de restregarles en la cara que existe una cosa que se llama libreta de direcciones o algo similar, en vez de apuntar las direcciones de correo cada vez en un post-it que pierden por el camino...

Conclusión, si os pasa alguna vez, relax y a darle a la tecla borrar....

Ta luego Lucass....

1 comentario:

Anónimo dijo...

No tendréis abierto el servidor de SMTP o algo...

Saludos
Luis