On Wed, Sep 14 2022 at 07:10:57 PM +0800, Henrik Pang
<panghen...@gmail.com> wrote:
Hello,
Is there a guide for adding a secondary MX with postfix?
the secondary MX would forward messages to the main MX.
When the main MX was in failure, the secondary MX should hold messages
for some time.
On 9/14/2022 6:14 AM, Jonathan Sélea wrote:
Here you go:
https://www.howtoforge.com/postfix_backup_mx
The first result on Google ;)
This is a perfect example of why NOT to use Google for your first resort
in asking questions! The linked howto is very bad, and it will make your
new secondary MX host a spam magnet.
The better advice is to reconsider the goal.
Why do you need this? If your primary MX host lacks reliability (could
be hardware, software, or Internet connectivity) your best bet is to
improve that reliability.
The concept of "secondary MX" dates way back to pre-spam days. I think
it can safely be considered an outmoded idea at this point. But if you
insist on doing it, make sure that you use:
* Recipient validation
* Identical anti-spam controls on both hosts
--
http://rob0.nodns4.us/
