Re: SA DKIM related bug 6462 - Possibly Gmail, Sendmail and/or Thunderbird related?

From: Todd Lyons <>
Date: Fri, 16 Dec 2011 09:36:07 -0800

On Thu, Dec 15, 2011 at 8:23 PM, Claus Assmann
<> wrote:
>> mail from: <>
> Still wrong, no space after colon.

Somewhat related to the above, I have both a sendmail system and an
exim system. Based on some email in the exim ML that pointed out that
requirement of no space after the colon I decided to do a little
research. I've not enough m4 fu to do this on sendmail, so I
configured my exim system to log and insert headers for any MAIL FROM
and RCPT TO that had a space after the colon. The amount of MUA's
that include that space when submitting messages is mind boggling.

I don't reject connections based on RBLs until the rcpt phase because
I want to see both sender and intended recipients. Since Sunday, on
one machine:
MAIL FROM: <space> 128991
RCPT TO: <space> 235080

Some of this, yeah, is botnet traffic. But based on previously
examining the logs, much of this is authenticated traffic too.


If Americans could eliminate sugary beverages, potatoes, white bread,
pasta, white rice and sugary snacks, we would wipe out almost all the
problems we have with weight and diabetes and other metabolic
diseases. -- Dr. Walter Willett, Harvard School of Public Health
Received on Fri Dec 16 2011 - 17:36:15 PST

This archive was generated by hypermail 2.3.0 : Mon Oct 29 2012 - 23:20:22 PST