BGP hijack from 23724 -> 4134 China?
Jeroen van Aart
jeroen at mompl.net
Fri Apr 9 20:01:43 CDT 2010
Patrick Giagnocavo wrote:
> This DID actually bite my company about 3 years ago.
> A customer went to China (usually in NYC) and could not send email
> through the mail server because they were using POP-before-SMTP instead
> of the mail submission port .
The problem did not lie with blocking IPs. But with offering a flawed
service such as pop before smtp to begin with. I know many ISPs/ESPs
still do, much to my chagrin. The only way to submit email should be
port 587 with TLS encryption, 3 years ago one could be forgiven for
offering deprecated (*) port 465 with SSL, but not anymore (msoft
clients have been fixed).
* urd 465/tcp URL Rendesvous Directory for SSM
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