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Re: [spf-discuss] Current spf record for comcast.net?

2007-01-23 22:24:17
On Tuesday 23 January 2007 22:23, Guy wrote:
My IP address tends to be blacklisted because it is DHCP assigned.  So I
have been forwarding my outbound email to smtp.comcast.net.  Does anyone
have current info on Comcast.net?

This list below is what I am using.  Where I have "new" is from this year.
I just found one of them a few minutes ago!  Seems like a never ending
battle.

"ip4:63.240.76.26 "     ; old
"ip4:63.240.77.83 "     ; new
"ip4:204.127.192.0/25 " ; new
"ip4:204.127.198.0/25 " ; old combined
"ip4:204.127.200.0/25 " ; new
"ip4:204.127.202.0/25 " ; old combined
"ip4:204.127.225.0/25 " ; new
"ip4:206.18.177.0/25 "  ; new
"ip4:216.148.227.0/24 " ; new

Does anyone know if comcast.net will publish a spf record anytime soon?

Maybe someone could recommend a better method of listing Comcast.net
outbound servers?  smtp.comcast.net does not cover all of them, maybe less
than half.  And from outside of comcast's network the DNS info could be
different.  I can't tell from inside!


Guy, write a script to check for a records.  From my notes from when I used 
the Comcast MTAs (and it looks the same from your mail), Comcast mail servers 
follow the following patterns:

EIther 

sccrmhc12.comcast.net

or

rwcrmhc13.comcast.net

With only the numbers varying:

$ dig a rwcrmhc13.comcast.net +short
216.148.227.153
204.127.192.83
$ dig a sccrmhc13.comcast.net +short
204.127.200.83
63.240.77.83

I'd suggest writing a script to pull out the IP addresses for you.

Scott K

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