On 8.3.2010, at 2.22, Wietse Venema wrote:
>> Of course I fixed the problem immediately as I found out about
>> it, but I'm just wondering how many other such setups there are
>> that break once IPv6 becomes more common. Should this setting
>> default to "any"? Is there really even a reason for it
Timo Sirainen:
> On 8.3.2010, at 1.26, Wietse Venema wrote:
>
> > smtp_address_preference (default: ipv6)
>
> Probably the whole reason for this thread was because of me. I
> used to have a working IPv6 setup, and then switched to a different
> ISP and just copied all my configs. Everything worke
On 8.3.2010, at 1.26, Wietse Venema wrote:
> smtp_address_preference (default: ipv6)
Probably the whole reason for this thread was because of me. I used to have a
working IPv6 setup, and then switched to a different ISP and just copied all my
configs. Everything worked fine for a few days so I
mouss:
> RFC 5321 (the same sentence is in 2821) says
> "In any case, the SMTP client SHOULD try at least two addresses."
>
> so a client that only tries two addresses is compliant. If you use
> twenty IPs, be prepared to see clients ignore most of them (and no
> tuning of _your_ postfix will help
Erik Logtenberg a écrit :
>> People who configure MX records should read the SMTP RFC, in
>> particular section 5. "Address Resolution and Mail Handling.
>>
>> By design, Postfix enforces sane limits on ALL information. In the
>> case of SMTP server IP addresses. Such limits protect Postfix
>> agai
Erik Logtenberg:
>
> > If your system has no useful IPv6 connectivity, disable IPv6 in Postfix.
> >
> > http://www.postfix.org/inet_protocols
>
> The issue is that other people with broken IPv6 connectivity have
> trouble delivering mail to me, because my mailservers have many
> different IP
> People who configure MX records should read the SMTP RFC, in
> particular section 5. "Address Resolution and Mail Handling.
>
> By design, Postfix enforces sane limits on ALL information. In the
> case of SMTP server IP addresses. Such limits protect Postfix
> against abusive sites.
Thank you a
> If your system has no useful IPv6 connectivity, disable IPv6 in Postfix.
>
> http://www.postfix.org/inet_protocols
The issue is that other people with broken IPv6 connectivity have
trouble delivering mail to me, because my mailservers have many
different IP addresses, both IPv4 and IPv6. D
On Thu, Mar 04, 2010 at 11:10:37PM +0100, Erik Logtenberg wrote:
> Anyway, I think now I understand what's going on. The distribution that
> I use (Fedora 12) left those two settings to their default. In this
> specific case the setting of 5 IP's just isn't high enough, since this
> host has 22 IP
By design, Postfix enforces sane limits on ALL information. In the
case of SMTP server IP addresses. Such limits protect Postfix
against abusive sites.
Wietse
> Kind regards,
>
> Erik.
>
>
> On 03/04/2010 10:27 PM, Wietse Venema wrote:
> > Erik Logtenberg:
> &
is? Any kind of
denial of service attack that disabling this limit would make possible?
Kind regards,
Erik.
On 03/04/2010 10:27 PM, Wietse Venema wrote:
> Erik Logtenberg:
>> Hi,
>>
>> I noticed that Postfix doesn't fall back on other IP addresses
>> associated w
Erik Logtenberg:
> Hi,
>
> I noticed that Postfix doesn't fall back on other IP addresses
> associated with a certain MX-server when it fails to accept mail, but
> only uses the firs IP address it finds. If that fails, Postfix will move
> on to the next MX-server,
Hi,
I noticed that Postfix doesn't fall back on other IP addresses
associated with a certain MX-server when it fails to accept mail, but
only uses the firs IP address it finds. If that fails, Postfix will move
on to the next MX-server, but won't try any other available IP addresses
f
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