On Tue, 6 Oct 2009, Wil Cooley wrote:
We are considering implementing limits on recipients per message and per
time period using the features that we have now in IMP. We have a fairly
sizable user base; it's hard to estimate concurrent connnections with
HTTP being stateless and our IMAP connections being cached with up-
imapproxyd, but I'd guess we peak around 3k concurrent users across 5
webmail front-ends.
Assuming we use the SQL driver for permissions and not DataTree, what
kind of additional overhead should we expect between the permissions
check and the outgoing e-mail logging?
Are people using these rate-limiting features with sizable installations
with success?
We use rate-limiting here to control accounts that have been phished (a
fairly regular occurrence). I think our installation is very similar in
size to yours... We peak around 3k concurrent IMAP connections (most from
Webmail) and have 3 webmail frontends. We are still using the Datatree
though.
Our limit is set to 500 messages per 24 hours, for all users. I've never
tried setting per-user limits.
Andy
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