[ExI] Fwd: Delivery Status Notification (Failure)

[John Klos]

Hi,

>  Any idea what is happening here?
>  550 5.7.1 Access denied. HELO does not resolve to connecting IPv6 address.
>  (HELO )

Yes. Sometimes Google screws up:

host 2804:14d:3c7a:42fe:b0c1:7f21:817c:cca8
Host 8.a.c.c.c.7.1.8.1.2.f.7.1.c.0.b.e.f.2.4.a.7.c.3.d.4.1.0.4.0.8.2.ip6.arpa 
not found: 3(NXDOMAIN)

As you can see, later messages went via different Google servers that 
aren't configured in a broken way.

John