> On 20 Nov 2017, at 12.54, Stephan von Krawczynski <skraw...@ithnet.com> wrote: > > If I had lets say 10 nodes handling incoming SMTP and delivery to local > maildirs in parallel and independantly on a network storage and imapping this > from another independant 4 nodes, then building a not needed bottleneck by > shifting over the local delivery via director and LMTP to fewer nodes is just > braindead creation of high loads on few boxes. > > And btw it scales perfectly because all that is needed if load increases is > up'ing additional nodes for SMTP/delivery or IMAP _which are all the same (of > two types)_. > > The loadbalancer needed for this can be equally used for e.g. web, ftp and > other services. So there is absolutely no extra stuff needed for the mail > setup.
Thanks for the info. But I was more after some real performance figures such as LMTP deliveries per second, IMAP logins per second or number of concurrent IMAP connections or mails FETCH/sec. Sami