On Mon, Jan 13, 2014 at 05:16:00PM +, Viktor Dukhovni wrote:
> The more mathematically astute among you might guess that "0.63"
> is close to the limiting ratio, and that the limit is the ever
> common "1 - 1/e". So the least frequent host is used at least 63%
> as often as the most frequent.
Wietse Venema:
> Tobias Gro?:
> > Besides the lack of randomization in the mail client, there is
> > another question: Should the mail client implement support for
> > multiple MX or implicit MX (A when no MX is given) records when
> > sending all traffic to smarthosts which are loadbalanced by DNS
Tobias Gro?:
> Besides the lack of randomization in the mail client, there is
> another question: Should the mail client implement support for
> multiple MX or implicit MX (A when no MX is given) records when
> sending all traffic to smarthosts which are loadbalanced by DNS
> regarding to the rfc 5
Viktor Dukhovni schrieb:
>On Mon, Jan 13, 2014 at 03:18:12PM +0100, Peer Heinlein wrote:
>
>> > We want to load balance mails from the intranet to the
>> > postfix-relayserver-farm for outgoing traffic.
>> > Can we abuse A-records to load-balance in the same way MX-records
>> > have been desig
On Mon, Jan 13, 2014 at 03:18:12PM +0100, Peer Heinlein wrote:
> > We want to load balance mails from the intranet to the
> > postfix-relayserver-farm for outgoing traffic.
> > Can we abuse A-records to load-balance in the same way MX-records
> > have been designed?
>
> No, because in that case M
Am 13.01.2014 15:55, schrieb Bauer, Stefan (IZLBW Extern):
> Hi List,
>
> thank you for confirming my opinions about DNS for load balancing. I share
> your opinions.
>
> @Peer - your advice is to use MX records. I don't think, MX-records can be
> used for relayservers.
>
> Our flow is:
>
>
MX records only apply to the destination FQDN for the email. Spoofing
the destined domain to force everything through the relays is not a good
idea.
Most load balancing of an outbound relay requires you to force or
manually configure the relay in your mail programs, to point to the load
balan
Hi List,
thank you for confirming my opinions about DNS for load balancing. I share
your opinions.
@Peer - your advice is to use MX records. I don't think, MX-records can be used
for relayservers.
Our flow is:
Client -> Exchange - > Relayserver -> t...@example.com
I only see a use case fo
DNS is not meant for that. At least, not the DNS itself. It is
something that goes under another tool, called GSLB (Global Site Load
Balancer). It will add/remove DNS records based on test availability.
It is something that is widely used on the Internet.
--
Christian Tardif
Quoting "Bau
Wietse:
> Yes, if the sender is Postfix. Postfix will randomly select from
> equal-preference IP addresses and IP protocols. This is intentional,
> so that mail does not get stuck when one path is broken.
See also my second response with pointers to relevant Postfix
configuration parameters that c
Stefan,
* Bauer, Stefan (IZLBW Extern) :
> We want to load balance mails from the intranet to the
> postfix-relayserver-farm for outgoing traffic.
> Can we abuse A-records to load-balance in the same way MX-records have been
> designed?
>
>
> A relay.example.com 192.168.0.1
>
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Am 13.01.2014 14:23, schrieb Bauer, Stefan (IZLBW Extern):
Hi Stefan,
> We want to load balance mails from the intranet to the
postfix-relayserver-farm for outgoing traffic.
> Can we abuse A-records to load-balance in the same way MX-records
have been
-Ursprüngliche Nachricht-
Von: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org]
Im Auftrag von Wietse Venema
Yes, if the sender is Postfix. Postfix will randomly select from
equal-preference IP addresses and IP protocols. This is intentional, so that
mail does not
Wietse Venema:
> Bauer, Stefan (IZLBW Extern):
> > Dear Developers/Users,
> >
> > We want to load balance mails from the intranet to the
> > postfix-relayserver-farm for outgoing traffic. Can we abuse
> > A-records to load-balance in the same way MX-records have been
> > designed?
>
> Yes, if th
Bauer, Stefan (IZLBW Extern):
> Dear Developers/Users,
>
> We want to load balance mails from the intranet to the
> postfix-relayserver-farm for outgoing traffic. Can we abuse
> A-records to load-balance in the same way MX-records have been
> designed?
Yes, if the sender is Postfix. Postfix will
Dear Developers/Users,
We want to load balance mails from the intranet to the postfix-relayserver-farm
for outgoing traffic.
Can we abuse A-records to load-balance in the same way MX-records have been
designed?
A relay.example.com 192.168.0.1
A relay.example.c
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