[gentoo-user] mirror email servers

[gentoo-user] mirror email servers

[El Nino]

Dear list friends,

i deployed several testing mail servers on different locations(towns).
now i need to mirror these all servers. how to do this?

idea(scenario) like,
o when one mail server goes down 2nd mail server get the email. but
when 1st up, 2nd mail server forward the email to 1st server.


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Re: [gentoo-user] mirror email servers

[Uwe Thiem]

On 11 April 2006 19:17, El Nino wrote:
> Dear list friends,
>
> i deployed several testing mail servers on different locations(towns).
> now i need to mirror these all servers. how to do this?
>
> idea(scenario) like,
> o when one mail server goes down 2nd mail server get the email. but
> when 1st up, 2nd mail server forward the email to 1st server.

MX entries in DNS?

Uwe

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Re: [gentoo-user] mirror email servers

[Patrick Watson]

Uwe Thiem wrote:
> On 11 April 2006 19:17, El Nino wrote:
>   
>> Dear list friends,
>>
>> i deployed several testing mail servers on different locations(towns).
>> now i need to mirror these all servers. how to do this?
>>
>> idea(scenario) like,
>> o when one mail server goes down 2nd mail server get the email. but
>> when 1st up, 2nd mail server forward the email to 1st server.
>>     
>
> MX entries in DNS?
>
> Uwe
That's close to what I use. However, MX entries alone aren't the 
solution. You also have to configure the mail servers to forward the 
mail on to the final destination once it comes back online. I'm not sure 
how to do that myself, and don't really have to time to put much effort 
into it since my mail server is only for small scale personal use. I 
just use dyndns.org's "Backup MX" service: 
http://www.dyndns.com/services/mailhop/backupmx.html. Even if that isn't 
a solution for you, it's at least a place to start looking.

Patrick

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Re: [gentoo-user] mirror email servers

[Joshua Schmidlkofer]

> That's close to what I use. However, MX entries alone aren't the
> solution. You also have to configure the mail servers to forward the
> mail on to the final destination once it comes back online. I'm not sure
> how to do that myself, and don't really have to time to put much effort
> into it since my mail server is only for small scale personal use. I
> just use dyndns.org's "Backup MX" service:
> http://www.dyndns.com/services/mailhop/backupmx.html. Even if that isn't
> a solution for you, it's at least a place to start looking.
>

Patrick is correct here, if you can, use a third-party service.  They
will always (sometimes?) have higher maintenance standards than stuff
that you do.

However, this is _very_ simple with postfix.

MX for mydomain.com
mydomain.com mail is handled by 10 server1.mydomain.com.
mydomain.com mail is handled by 20 server2.mydomain.com.


mail server 1:
  Accepts mail for mydomain.com

mail server 2:
  Postfix, with
relay_domains = mydomain.com
mydestination  = server2.mydomain.com
maximal_queue_lifetime = 30d
bounce_queue_lifetime    = 1d

 - Maximal queue lifetime affects how long it reties delivery.
  - Bounce queue lifetime will help alleviate problems with spammers
overflowing the bounce queue.

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