Re: OpenSMTP as mx backup

2018-11-26 Thread Chris Bennett
+2 on that! Sorry +1 is just not enough!

I have a backup, but that's only IF I know there's a problem.
If I have any net access, if I'm not traveling. If .

Most of my email is unimportant. But when it is, it's $$ or some
emergency.

Chris



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Re: Opensmtpd failover

2018-11-26 Thread Craig Skinner
Hi Thomas,

On Sun, 25 Nov 2018 04:12:10 +0100 Thomas Bohl wrote:
> > smtp2 doesn't deliver the mail to an IMAP mail storage daemon.
> > 
> > Instead, it spools it and waits
> 
> But why? Just deliver it and be done. Can't see many drawbacks in
> that.
> 

Backup MX servers don't have any mail storage, nor IMAP/POP daemon.

They are another hop along the delivery path to the primary MX servers.



Backup MX machines are not the message's final destination;-

Pretend you are going to the world's biggest party, which is held every
New Year's Eve in Edinburgh, so you board an aeroplane to Edinburgh.

But the snow hits Scotland, so your aeroplane lands in London. England
is not your final destination. It is a backup airport in a different
country. You have not travelled to the party capital. So you wait/spool
in London until Edinburgh airport is receiving traffic. Then then you
get the next flight to your final destination & Hogmanay for 3 days.


Cheers,
-- 
Craig Skinner | http://linkd.in/yGqkv7

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Re: OpenSMTP as mx backup

2018-11-26 Thread Craig Skinner
On Sun, 25 Nov 2018 15:49:44 +0100 Gilles Chehade wrote:
> .. if you have a secondary MX that keeps your mail for longer
> than 4 days, which is already quite long, it means that you have more
> trust in the reliability of your secondary MX than your primary MX and
> this essentially means your setup is wrong.

There are many possible problems.

If your primary MX's network goes down while you are away on 3 weeks
holiday, the backup MX can spool mail until you return from holiday to
have the ISP fix the wiring, etc. which might take a few days...

Or if the primary MX has a failure on Friday evening, and you can't
order parts until Monday, which take a week to arrive

Some shit takes more than 4 days to fix.

Cheers,
-- 
Craig Skinner | http://linkd.in/yGqkv7

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