similar to: imap service count>1 (was System load spike ...)

Hello, On Fri, 21 Apr 2017 10:43:47 +0200 dave at evilcigi.eu wrote: > Hi everyone, > > I'm running dovecot with quite a lot of users and lots of active imap > connections (like 20'000). I'm using different user IDs for users, so I > need to have imap {service_count=1} - i.e. I have a lots of imap > processes running. > We peaked out at 65k imap processes

> On October 27, 2017 at 11:27 PM Joseph Tam <jtam.home at gmail.com> wrote: > > > Aki Tuomi wrote: > > > The use of salt, today, is to prevent the attacker from directly seeing > > who has same passwords. Of course it also will make a rainbow table > > attack less useful, > > Not just less useful, but almost infeasible. Given the use of random

"Rajesh M" <24x7server at 24x7server.net> writes: > during peak times here are the results for connections > > [root at ns1 domains]# doveadm who |grep imap |wc -l > username # proto (pids) (ips) > 631 > [root at ns1 domains]# doveadm who |grep pop3 |wc -l > username # proto (pids)

I ran into two issues trying to upgrade our dovecot installation (Solaris 10). 1) Does not compile with OpenSSL 0.9.7 Not a big deal, as I was able to successfully against OpenSSL 0.9.8, but does dovecot require OpenSSL >= 0.9.8 now? libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../.. -I../../src/lib -I../../src/lib-test -std=gnu99 -O3 -fomit-frame-pointer -mcpu=ultrasparc -Wall -W

> I've asked this before, but now it's time to move one server to > another, I can't delay the operation anymore (the older server is > failing) > > Both server are pretty old: 1.2.15 > > Probably, faster way would be to rsync all mailboxes from the older > server to the newer one. I can start migrating everything while > running then, stop the older server

Hi everyone, I'm running dovecot with quite a lot of users and lots of active imap connections (like 20'000). I'm using different user IDs for users, so I need to have imap {service_count=1} - i.e. I have a lots of imap processes running. Everything works fine, until I reload dovecot configuration. When that happen, every client is forced to relogin in the same time and that

Hello Timo, I'm trying to configure dovecot-2.1.15 master correctly regarding imap-login limits. I want to use service_count=0 and I'm starting with something like this : #default_process_limit = 100 #default_client_limit = 1000 service imap-login { [...] service_count = 0 process_min_avail = 8 vsz_limit = 1024M } -> Does it make sense to set a process_limit if

Aki Tuomi wrote: > The use of salt, today, is to prevent the attacker from directly seeing > who has same passwords. Of course it also will make a rainbow table > attack less useful, Not just less useful, but almost infeasible. Given the use of random salts, you would have to generate (number of possible salts) rainbow tables. This drastically changes the CPU/storage tradeoffs. >

On 29 Nov 2016, at 2.57, Christian Balzer <chibi at gol.com> wrote: > > service imap { > # Most of the memory goes to mmap()ing files. You may need to increase this > # limit if you have huge mailboxes. > #vsz_limit = $default_vsz_limit > vsz_limit = 512M > > # Max. number of IMAP processes (connections) > #process_limit = 1024 > process_limit = 524288

Rajesh M wrote: > i wish to improve the performance further by caching the logins. > current the same is kept disable because when user's change passwords > then they are not able to immediately login with the new password for > some time. How to solve this issue. Dovecot shouldn't be doing that. According to https://wiki2.dovecot.org/Authentication/Caching Data is

Hello, We've got a pretty substantial dovecot installation (versions 2.1.7 and 2.2.13 on the backends, but tested with 2.2.24 as well) and this is the relevant config snippet from 10-master.conf: --- default_process_limit = 1024 default_client_limit = 16384 [...] service imap { # Most of the memory goes to mmap()ing files. You may need to increase this # limit if you have huge

Thanks Joseph, Aki, but something missing from upgrade document, where does the dh param file go? I located ssl-parameters.dat so I will put it there. Quoting Joseph Tam <jtam.home at gmail.com>: > On Fri, 22 Jun 2018, Joseph Tam wrote: > >> However, recent advances make this condition obsolete [*] and not >> really safer, so a much faster way to generate a DH key is

Hi, The leakage problem you describe is very, very common and you will need to do something to address it. I modified the version of Speex I use to implement an adjustable max gain. If you look at speex_compute_agc in preprocess.c, you will see: if (agc_gain>200) agc_gain = 200; This max of 200 is usually more than enough to amplify leakage which occurs either in the sound

Nice to get to hear this. However, the password is not stored in clear text here. How then does it work? On Fri, Dec 21, 2018, 00:58 Joseph Tam <jtam.home at gmail.com wrote: > On Thu, 20 Dec 2018, Odhiambo Washington wrote: > > > At the expense of sounding stupid, could you please expound on the > > sequence? :) > > In a nutshell, during protocol handshake, the server

<!doctype html> <html> <head> <meta charset="UTF-8"> </head> <body> <div> <br> </div> <blockquote type="cite"> <div> On 07/08/2019 00:37 Joseph Tam via dovecot < <a href="mailto:dovecot@dovecot.org">dovecot@dovecot.org</a>> wrote: </div>

aside from cat? On Thu, Nov 29, 2018 at 03:07:58PM -0800, Joseph Tam wrote: > On Thu, 29 Nov 2018, Marc Roos wrote: > > >When concatenating mbox files like described here > >https://xaizek.github.io/2013-03-30/merge-mbox-mailboxes/. You will end > >up with an 'unsorted' mbox file. Is this going to be a problem > >esspecially when they are large >2GB's

Hey Joseph Thanks. Strace seems like a very useful tool Only problem is that I dont think it is maintained on ubuntu. Tried to run:- apt-get install strace but could not download it. Might need to download and build it. Do you know any other way of getting it? Thanks Kevin A. On Thu, Jan 29, 2015 at 3:34 PM, Joseph Tam <jtam.home at gmail.com> wrote: > Kevin writes: > >

Dear Joseph, Just to clarify, the pid you are referring to is of dovecot? Correct? Thanks Kevin On Thu, Jan 29, 2015 at 3:34 PM, Joseph Tam <jtam.home at gmail.com> wrote: > Kevin writes: > > Appreciate if you could help with this. I have been trying to address this >> "slow search" issue for a while with very limited success(I was trying to >> implement

> On December 5, 2016 at 9:55 PM Joseph Tam <jtam.home at gmail.com> wrote: > > > > Timo announced: > > > https://dovecot.org/releases/2.2/dovecot-2.2.27.tar.gz > > https://dovecot.org/releases/2.2/dovecot-2.2.27.tar.gz.sig > > > > Note that the download URLs are now https with a certificate from Let's Encrypt. > > wget complained

> On June 1, 2017 at 4:05 AM Joseph Tam <jtam.home at gmail.com> wrote: > > > > > I've tried using IMAP with mail_location pointed at the snapshot, but, > > though I can get a listing of emails in the mailbox, the fetch fails when > > dovecot can't write-lock dovecot.index.log. > > I've thought about doing this someday (adding snapshots to