Greylisting

[RW]

On Thu, 24 Aug 2017 10:20:41 -0400
David Rosenstrauch wrote:

> On 2017-08-24 10:03 am, RW wrote:
> > On Thu, 24 Aug 2017 09:49:45 -0400
> > David Rosenstrauch wrote:
> >   
> >> I've been a member of this list for years.  But I recently had an
> >> email to the list rejected due to greylisting:
> >> 
> >> <xfce at xfce.org>: host mail.xfce.org[138.48.2.106] said: 450 4.7.1
> >>      <xfce at xfce.org>: Recipient address rejected: Greylisted for 5
> >> minutes (in
> >>      reply to RCPT TO command)
> >> 
> >> Any idea what's going on here?  I thought that greylisting simply
> >> delayed emails, not rejected them.  (BTW, my email provider is
> >> Dreamhost.)  
> > 
> > It wasn't rejected, it just used the word "rejected", 450 is a
> > temporary error.  
> 
> It was rejected. 

not based on what you provided, 450 is a normal temporary failure code
used in greylisting. If the code isn't a 5xx then it's not been
rejected.

>  The email never appeared on the list. 

That's not the same thing.

> Plus the text above was included in a reject email that the Dreamhost
> MTA sent me.

You may have got a DSN of some kind, but Dreamhost's MTA didn't have a
valid reason for reporting a rejection.