On 2023-05-22 at 19:53:11 UTC-0400 (Tue, 23 May 2023 07:53:11 +0800)
Tom Reed via Postfix-users
is rumored to have said:
PS: Why do you (think you) need a backup MX?
Hello
I am not sure why I need a backup mx indeed,
If you don't know why you want the added complexity, you do not want
Hello.
It really depends on your mail volume and the reliability of your
primary MX hostname. Typically the RFC permits mail to be delayed for up
to 5 days at which mail will bounce back as undeliverable. For most
low-volume sites, a primary only MX configuration is fine.
Both of those
Tom Reed via Postfix-users skrev den 2023-05-23 01:53:
I am not sure why I need a backup mx indeed, but if you make a simple
dig,
you find gmail, fastmail, protonmail, comcast, free.fr those big
providers
do have backup MXs.
Though yahoo, outlook don't have backup MX as a comparison.
one
>
> PS: Why do you (think you) need a backup MX?
Hello
I am not sure why I need a backup mx indeed, but if you make a simple dig,
you find gmail, fastmail, protonmail, comcast, free.fr those big providers
do have backup MXs.
Though yahoo, outlook don't have backup MX as a comparison.
Thank you Victor, you are the embodiment of truth.
> On Mon, May 22, 2023 at 08:26:19PM +0800, Tom Reed via Postfix-users
> wrote:
>
>> 1. postfix is a backup MX for foo.com
>> 2. this postfix uses other MTA as relay_host
>
> This would be a misconfiguration. A backup MX host MUST NOT be an
>
Tom Reed via Postfix-users:
> Hello list,
>
> Given the case that:
>
> 1. postfix is a backup MX for foo.com
> 2. this postfix uses other MTA as relay_host
Please don't do that. By design a Postfix backup MX host will deliver
to an MX host with a 'better' MX preference. You are frustrating that
On 22.05.23 20:26, Tom Reed via Postfix-users wrote:
Given the case that:
1. postfix is a backup MX for foo.com
2. this postfix uses other MTA as relay_host
When the primary MX for foo.com is down, messages to u...@foo.com will be
delivered into backup MX. And, backup MX delivers the message
On Mon, May 22, 2023 at 08:26:19PM +0800, Tom Reed via Postfix-users wrote:
> 1. postfix is a backup MX for foo.com
> 2. this postfix uses other MTA as relay_host
This would be a misconfiguration. A backup MX host MUST NOT be an
effective null client that relays *all* non-local mail to a
On 2023-05-22 at 08:36:49 UTC-0400 (Mon, 22 May 2023 14:36:49 +0200
(CEST))
Bernardo Reino via Postfix-users
is rumored to have said:
My world is only a very small subset of the real world :), but in that
world, if I say that a given server is the MX for a domain, then
that's that, it should
On Mon, 22 May 2023, Tom Reed via Postfix-users wrote:
Given the case that:
1. postfix is a backup MX for foo.com
2. this postfix uses other MTA as relay_host
When the primary MX for foo.com is down, messages to u...@foo.com will be
delivered into backup MX. And, backup MX delivers the
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