On Tue, Dec 22, 2015 at 7:26 AM, Noel Jones <[email protected]> wrote:
> On 12/21/2015 4:54 PM, Wolfe, Robert wrote: > > Hi all. This is not a postfix-specific question, but rather a > > generic one, but I hope I can get the answer I am searching for here. > > > > > > I run a third part SMTP filtering program in which I have "EHLO/HELO > > Must Resolve" turned on. I am amazed at the number of exceptions I > > have to put into my configuration to accept email from domains > > affected by this. Is this normal practice, or, according to RFCs, > > is the FQDN _REQUIRED_ to be present in the EHLO/HELO verbage during > > an SMTP session? > > > I quit using reject_unknown_helo_hostname a couple years ago when it > quickly became clear that a significant percentage of the clients > rejected were legit. Of course, YMMV. > > were these MUAs? or MTAs? -jf
