On Tue, 07 Jul 2009, Daniel L. Miller wrote: > So...my initial thought was I'd have to create a public Internet name > for the fax gateway, and apply some level of security to only accept > submissions from Intuit. However, I'm now wondering if I can accomplish > the same thing by using address extensions instead of a different server > name. So I'd be sending emails to "1234567890+...@mydomain.com", and > Postfix would then identify a fax is to be sent by the extension, > translate that to "1234567...@fax.myinternaldomain.com", and process > accordingly. I would still have to protect the "fax" extension, but my > thought is that the extension would be less likely to be probed than a > published DNS name, and therefore be subject to fewer attacks.
Use some sort of virtual alias mapping along with ensuring that foo+...@example.org is valid at SMTP time. Untested example: /^(\d+)\+...@mydomain.com$/ $...@fax.myinternaldomain.com -- Sahil Tandon <sa...@tandon.net>
