Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread @lbutlr
On Nov 2, 2016, at 7:13 AM, Bill Cole wrote: > On 2 Nov 2016, at 7:28, Karel wrote: > >>> On 2016-11-02 11:36, Wietse Venema wrote: NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host rejected: cannot find your hostname, [x.x.x.x] >>> >>> Note that this is a 450 status

Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Bill Cole
On 2 Nov 2016, at 7:28, Karel wrote: On 2016-11-02 11:36, Wietse Venema wrote: NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host rejected: cannot find your hostname, [x.x.x.x] Note that this is a 450 status, because the name server did not reply. A proper SMTP client will

Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Karel
> On 2016-11-02 13:27, Wietse Venema wrote: > > Karel: >>> On 2016-11-02 11:36, Wietse Venema wrote: NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host rejected: cannot find your hostname, [x.x.x.x] >>> >>> Note that this is a 450 status, because the name server did not

Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Wietse Venema
Karel: > > On 2016-11-02 11:36, Wietse Venema wrote: > >> NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host > >> rejected: cannot find your hostname, [x.x.x.x] > > > > Note that this is a 450 status, because the name server did not reply. > > A proper SMTP client will therefore

Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Karel
> On 2016-11-02 11:36, Wietse Venema wrote: >> NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host >> rejected: cannot find your hostname, [x.x.x.x] > > Note that this is a 450 status, because the name server did not reply. > A proper SMTP client will therefore try to deliver the

Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Wietse Venema
Karel: > Hello, > > I am using following smtpd_client_restriction: > > reject_unknown_client_hostname > > Now, both my nameservers were offline, and postfix could not resolve IP > addresses and thus rejected all hosts: > > NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host >

Re: reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Karol Augustin
On 02/11/16 09:25, Karel wrote: Hello, I am using following smtpd_client_restriction: reject_unknown_client_hostname Now, both my nameservers were offline, and postfix could not resolve IP addresses and thus rejected all hosts: NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client

reject_unknown_client_hostname when nameserver is unreachable

2016-11-02 Thread Karel
Hello, I am using following smtpd_client_restriction: reject_unknown_client_hostname Now, both my nameservers were offline, and postfix could not resolve IP addresses and thus rejected all hosts: NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host rejected: cannot find your h