[kwlug-disc] Testing a mail port

[Hubert Chathi]

On Wed, 9 Mar 2016 15:26:53 -0500, Khalid Baheyeldin <kb at 2bits.com> said:

> Here is another clue, for their SPF setup: dig txt kwflowers.com

> ;; ANSWER SECTION: kwflowers.com.  21599 IN TXT "v=spf1 mx:ufn.com
> include:cmail1.com include:spf.mtasv.net include:amazonses.com -all"

> This means that someone did setup ufn.com for accepting emails, as
> well as cmail1.com, spf.mtasv.net and amazonses.com

Except that they did it wrong.  mx:ufn.com means to include the MX
records for ufn.com, but since ufn.com uses GMail, this would just allow
the GMail servers to send mail for kwflowers.com.  What they wanted to
do was to use a:mail.ufn.com instead of mx:ufn.com.