Bouncing messages with missing From: info

Jerry Benton jerry.benton at
Wed Apr 17 06:22:04 IST 2013

Null sender is RFC standard for NDRs.

On Wed, Apr 17, 2013 at 3:11 AM, Rick Cooper <rcooper at> wrote:

> Raymond Norton wrote:
> > I am using MailScanner 4.84.5 with postfix. I have one relay domain
> > getting hit hard by  non delivery notices which are missing any info
> > in the "From" field.
> >
> > Is there a rule I can add to postfix that will bounce messages like
> > this?
> >
> >
> > Raymond
> You should not bounce or reject anything based on null senders as that
> prevents legitimate bounces.
> You do not state if the TO addresses are valid, if they are you will have
> to
> deal with it unless you see a pattern of valid users that are getting the
> bounces, in which case (I have had to do this in the past) we deny or
> redirect bounces to that/those users that also have a null sender. If they
> are invalid then you should be rejecting them at RCPT time.
> My philosophy is I NEVER bounce anything. Once accepted it's my problem and
> I do not accept non deliverable emails, or emails that are supposedly
> coming
> from my domain but not one of my servers or any Hard fail SPF result or
> failed DKIM, or other criteria. Once I take it it's my problem so I just
> don't take problems
> Rick
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Jerry Benton
Mailborder Systems
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