[CentOS] Re: Mail server setup for small ISP

[Ugo Bellavance]

Fajar Priyanto wrote:
> On Friday 04 January 2008 00:09:06 Ugo Bellavance wrote:
>> I think that squirrelmail and
>> horde would do a good job for webmail.
>>
>> 	There shoudn't be any troubles having some redundancy for DNS, web
>> servers, mtas, but what about IMAP/POP? linux-HA?  MySQL replication
>> should be enough, I guess.  Or maybe linux-HA as well.  I wonder if I
>> should add GFS to the mix to have multiple IMAP/POP servers use the same
>> storage.  Or maybe IMAP proxies?
>>
>> 	Any insights welcome :).
> 
> Hi Ugo,
> Congrats on your plan opening the ISP.

Thanks, but I will only be doing some work for them, I'm not opening the 
ISP myself...

> For webmail, a professional touch would be nice for your customer. Instead of 
> using plain squirrelmail, try using http://www.nutsmail.com/ instead.

Good Idea

> AFAIK, redundancy for mail server seldom uses linux-ha/any other failover 
> stuffs. It is most common to use 'backup MX' in DNS settings. So, when the 
> main server in unreachable, the sender mail server would try to the secondary 
> MX through DNS query. 

That's the easy part, but where do you store the e-mail once you have 
accepted it?  If the pop/IMAP server is down for a while, people won't 
be able to retreive their e-mail...