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Problemas de recepci贸n en Hotmail y Yahoo

Posted on | mayo 31, 2007 | No Comments

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Algunos clientes, especialmente en Am茅rica, nos han comunicado que tienen problemas para enviar correos a hotmail.com. Tras descartar que se trate de un problema en los servidores de Dimensis, se ha contactado con hotmail y parece ser que se trata de un problema con el filtro antispam de la compa帽铆a. Los mensajes salen del servidor de Dimensis, pero quedan en cola de env铆os pendientes de procesamiento cuando llegan a Hotmail. Una vez all铆 no son procesados, y el sistema tampoco env铆a ning煤n correo de advertencia al remitente.

Hemos observado que el problema se repite s贸lo en algunos servidores de correo de la red de hotmail.com, aunque no en todos.

Gracias al Bruno Touleau (Web Gear International) hemos obtenido la siguiente respuesta por parte de Hotmail:

We received your message at randomtestacct@hotmail.com . This message was delivered to the Junk Mail folder in this account. I am unable to disclose what specifically within the content of your message is causing our filters to view it as unsolicited e-mail. In general, however, I can explain what happens with our filters.

Hotmail uses two spam filtering technologies. We use the Brightmail system and we use our own SmartScreen filters. I can鈥檛 speak to Brightmail鈥檚 filtering technology as they are a totally separate company but I can talk a little bit about SmartScreen. SmartScreen is built around the technology of machine learning. SmartScreen鈥檚 filters are trained to recognize what is spam and what isn鈥檛 spam. In short, we filter incoming emails that look like spam. I am not able to go into any specific details about what these filters specifically entail, as this would render them useless.

We also base our spam rating on the reputation of the sender. One way to positively impact the reputation of your IP is to obtain SPF/Sender ID records. We recommend that you have SPF/Sender ID records in place for all domains sending using the your IP 213.195.72.36.

While you have valid SPF/Sender ID records published for your domain (webgearinternational.com) and your domain has been added to the Sender ID database. This may take up to 2 business days to be fully replicated in the DNS and our systems. The email headers in the sample message that you sent indicate that your information has not been fully replicated in our systems, yet.

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