Well this is the scenario.
With 90 customers, having between 5 to 10 email accounts, all of them
sending every day no more than 300 emails/h
giving as result peaks of even 270,000 emails an hour. It is simple
math to know that with only 1 IP for all that outbound will at least
start to be defered. To that you can add the fact that some user do
send email as mailing marketing within the already set limitations but
still their lists (who knows!) might and surely be plenty of haverst
emails and spam-traps and complainers. So in less than a week our main
IP is broken. Lowering the sending limits bellow 300/h is not
atractive to new customers. So you see the only way to balance this
issues is by changing the outbound IP in a random way or from time to
time.
I really hope some of you guys can help me out as I've been told that
this list is very helpfull with its users.
Regards.
On sáb 04/02/12 6:09 PM , Peter Peltonen [email protected]
sent:
Hi,
On Sat, Feb 4, 2012 at 8:10 PM, wrote:
> I just build my qmail-toaster box for my sharing host business. But
Im trying to protect the IPs we use for send customers emails under no
more than 300/h. Since I have 90 users on that box and some users have
like 10 emails each, I really need a way to protect the main IP.
I'm wondering: what does limit you for sending more than 300 mails
per
hour -- your ISP? And how does they do this -- is your ISP perhaps
blocking all other SMTP traffic from you than their own and they
somehow limit this smart host connection? Could you maybe ask them to
make an exception with your server, so you can make direct SMTP
connections to the MX hosts you are delivering messages to, so you
won't have to use your ISP's SMTP server as a smart host?
Or are you just afraid that if you relay your customers email you
will
get blacklisted because of spam they might send? For this I would
rather see the solution being preventing them sending spam than
changing IP addresses: forcing them to use authentication is the
first
obvious step.
Best,
Peter
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