> > A client asked me to build for him a mail solution, capable
> of sending
> > up to
> > 1 milllion emails a day, while each email doesn't exceed
> 50KB in size.
>
> How many users will you have reading mail, or this outgoing
> mail only -- for "marketing" purposes?

Outgoing only

> Hardware-wise, Postfix can easily handle the sort of drops
> you are talking about.
>
> Victor Duchovni, resident Postfix guru, once set up an
> 11-machine backend to do a million messages per hour. You
> could get away with fewer servers if you are willing to
> extend your total drop time.

I am more familiar with sendmail, so would prefer it as a MTA.
If this is a problem, I'll have to learn Postfix, which is possible.

> Assuming no A/V and/or content filtering, most setups are I/O
> bound...so you definitely want a proper disk subsystem.
>
> > 4) what is your recommended software solution
>
> Postfix, LDAP, Dovecot, with a NetApp backend.

Not MySQL but LDAP? Could you explain?

> > 3) is there any max emails a day from IP/domain, which
> triggers black
> > and blocklists
>
> That is the real problem. How big are your lists and where
> did you get them from? A million emails a day sounds like you
> would run into trouble very quickly.

Right, looks troublesome.
Is there an equation to know approximate maximum of emails/day per
IP/domain?
The lists are 1-2 millions, legally bought.

> In addition to the admins you hire to manage this mail setup,
> I would strongly recommend you have a dedicated team of
> deliverability people.

I am sorry, I don't understand the meaning of deliverability people - could
you please explain this a bit further?

> Also, you should have multiple upstream ISPs, most ISPs
> nowadays are fairly strict nowadays and a million message
> drop/day sounds like you will be getting lots of
> cease-and-desist notices from your ISPs.

Even if the servers are co-located and distributed among data centers and
have dedicated pipes each?


Thank you, Thomas!

> Thomas


Arthur