nullmailer - Sending failed: Could not exec program

Gene Heskett gheskett at
Sat Jun 21 15:47:24 UTC 2014

On Saturday 21 June 2014 11:33:01 Graham Watkins did opine
And Gene did reply:
> On 21/06/14 16:12, compdoc wrote:
> >> Thank you for the reply, but /var/spool/nullmailer/queue just
> >> seems to show that I have 8 messages unsent
> > 
> > You have to delete them
> OK, been there, done that.  Now what?
> Just sent another message from the command line:
> echo 'This is the message.' | mail -s 'Subject line here'
> at

That is an outside address. Does your dns resolver know who 

If your local network is host file based, then it even works between 
machines. I can send an email from lathe.coyote.den to coyote.coyote.den 
with gene at coyote.coyote.den as the address.  That assumes the resolver is 
set for host,dns for search order.
> that hasn't arrived either.

And you must delete it from the queue before sending another test msg 
after changing whatever you need to change. A stuck msg hangs the whole 

> sudo nullmailer-send
> Rescanning queue.
> Starting delivery, 1 message(s) in queue.
> Starting delivery: protocol: --port=25 host: file:
> 1403364453.2933
> Sending failed: Could not exec program
> Delivery complete, 1 message(s) remain.
> Will provide any more info required though I'm a bit outside my comfort
> zone here.
> Cheers,
> Graham

Generally if the mail originates on this machine, you only need the 
username to send yourself an email on that machine.  You may have to make 
a group entry that merges that name with yours if the originating user is 
not you.

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <>
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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