Re: [Mimedefang] Only MX record is fake

2011-11-18 Thread Kris Deugau
kd6...@yahoo.com wrote: Any spammer stupid enough to try to send his spew forging this host name as the sender address will also face an SPF-RR v=spf1 -all (while those idiots still resolving ONLY TXT-RRs for SPF will get v=spf1 +all). Some ahem idiots are still using DNS infrastructure that

Re: [Mimedefang] Only MX record is fake

2011-11-18 Thread Les Mikesell
On Fri, Nov 18, 2011 at 9:36 AM, Kris Deugau kdeu...@vianet.ca wrote: kd6...@yahoo.com wrote: Any spammer stupid enough to try to send his spew forging this host name as the sender address will also face an SPF-RR v=spf1 -all (while those idiots still resolving ONLY TXT-RRs for SPF will get

Re: [Mimedefang] Only MX record is fake

2011-11-18 Thread Kevin A. McGrail
On 11/18/2011 10:36 AM, Kris Deugau wrote: kd6...@yahoo.com wrote: Any spammer stupid enough to try to send his spew forging this host name as the sender address will also face an SPF-RR v=spf1 -all (while those idiots still resolving ONLY TXT-RRs for SPF will get v=spf1 +all). Some ahem

[Mimedefang] Only MX record is fake

2011-11-17 Thread Mike Grau
Hello folks, Those people checking for valid MX records for a sender's domain from within MIMEdefang ... is anybody checking if a sender's one and only MX record is a fake MX tempfailing service? Has anyone ever seen this type of setup for legitimate e-mail? For example: # nslookup

Re: [Mimedefang] Only MX record is fake

2011-11-17 Thread dfs
Those people checking for valid MX records for a sender's domain from within MIMEdefang ... is anybody checking if a sender's one and only MX record is a fake MX tempfailing service? Has anyone ever seen this type of setup for legitimate e-mail? Our commercial product has a setting to reject

Re: [Mimedefang] Only MX record is fake

2011-11-17 Thread Ben Kamen
On 2011-11-17 3:05 PM, d...@roaringpenguin.com wrote: Those people checking for valid MX records for a sender's domain from within MIMEdefang ... is anybody checking if a sender's one and only MX record is a fake MX tempfailing service? Has anyone ever seen this type of setup for legitimate

Re: [Mimedefang] Only MX record is fake

2011-11-17 Thread Kevin A. McGrail
Those people checking for valid MX records for a sender's domain from within MIMEdefang ... is anybody checking if a sender's one and only MX record is a fake MX tempfailing service? Has anyone ever seen this type of setup for legitimate e-mail? For example: # nslookup -type=MX babe.org

Re: [Mimedefang] Only MX record is fake

2011-11-17 Thread kd6lvw
--- On Thu, 11/17/11, Mike Grau m.g...@kcc.state.ks.us wrote: Those people checking for valid MX records for a sender's domain from within MIMEdefang ... is anybody checking if a sender's one and only MX record is a fake MX tempfailing service? Has anyone ever seen this type of setup for