similar to: dovecot on wheezy, best ssl configuration ?

Hi thanks for your help! Trying to set your same parameters, when restarting dovecot, gives the error: doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf line 136: Unknown setting: ssl_prefer_server_ciphers doveconf: Error: managesieve-login: dump-capability process returned 89 doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf line 136: Unknown setting:

Hi, To default dovecot.conf file I added (based on found documentation): ssl = required disable_plaintext_auth = yes #change default 'no' to 'yes' ssl_prefer_server_ciphers = yes ssl_options = no_compression ssl_dh_parameters_length = 2048 ssl_cipher_list =

Cipher list which You post provide better compatibility or security than those which I currently have? On older software version these cipher list works well and not generate any errors when I run Internal PCI scan test from https://cloud.tenable.com for another server. But for new server with newer software during test I got errors in mail.err. 2017-04-27 10:00 GMT+02:00 Aki Tuomi <aki.tuomi

Thank You for answers. But: 1. How should be properly configured ssl_cipher_list? 2. Ok, removed !TLSv1 !TLSv1.1. 3. Strange thing with ssl_protocols and ssl_cipher_list, because on older server on Ubuntu 14.04 LTS, dovecot 2.2.9 and postfix 2.11.0 these two lines looks exactly this same and no errors in mail.err file and mailes works without any problem. 4. No, currently I don't use LMTP.

What kind of test are you running? Aki > On April 27, 2017 at 12:00 PM Poliman - Serwis <serwis at poliman.pl> wrote: > > > I turned of ssl_cipher_list in dovecot.conf file (so it's default) but test > still gives errors: > Apr 27 08:55:06 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: > error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown

In setting up my new mail server, I am getting the following in the logs: Oct 11 07:10:59 kumo dovecot[5704]: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=24.53.79.10, lip=172.26.12.90, *TLS handshaking: SSL_accept() syscall failed: Success*, session=<B9OokqCUD+UYNU8K> I have tried various ssl_protocols entries, but for now have defaulted back to

Greetings, I have had to reinstall my email server on another Linux (centos 7.6) VPS, with a newer version of dovecot, other software and a brand new letsencrypt certificate just for email withpostfix and dovecot (that certificate works fine with postfix). Output of dovecot --version and dovecot -n on the new server is below. Now, messages ARE delivered in the right IMAP mailboxes, but when I try

Hi All First the essentials: dovecot --version: 2.2.15 /usr/local/etc/dovecot/conf.d/10-ssl.conf: ssl = required ssl_cert = </usr/local/openssl/certs/mail.domain.com.chained.dovecot.ecdsa.crt ssl_key = </usr/local/openssl/certs/mail.domain.com.ecdsa.key ssl_protocols = !SSLv2 !SSLv3 ssl_cipher_list =

On 09/03/16 10:44, Florent B wrote: > Hi, > > I don't see any SSL configuration option in Dovecot to disable > "Client-initiated secure renegotiation". > > It is advised to disable it as it can cause DDoS (CVE-2011-1473). > > Is it possible to have this possibility through an SSL option or other ? > > Thank you. > > Florent ssl_protocols = !SSLv3

On Thu, Mar 10, 2016 at 12:30 PM, Osiris <dovecot at flut.demon.nl> wrote: > On 09-03-16 13:14, djk wrote: >> On 09/03/16 10:44, Florent B wrote: >>> Hi, >>> >>> I don't see any SSL configuration option in Dovecot to disable >>> "Client-initiated secure renegotiation". >>> >>> It is advised to disable it as it can

Hi *, The change in default SSL settings between 2.2 and 2.3 cut off a few clients; Microsoft-hosted Exchange (?) being one of them: Jan 4 11:02:56 kremail dovecot: pop3-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=40.101.4.hisip, lip=myip, TLS handshaking: SSL_accept() failed: error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher,

On 12/2/2014 1:32 AM, Reindl Harald wrote: > > Am 02.12.2014 um 06:44 schrieb Will Yardley: >> On Mon, Dec 01, 2014 at 09:27:48PM -0800, Darren Pilgrim wrote: >>> On 12/1/2014 4:43 PM, Will Yardley wrote: >>>> Can you use both ssl_protocols *and* ssl_cipher_list in the same config >>>> (in a way that's sane)? >>> >>>> Is there a

Hi Folks, after adding TLSv1.2 to by TLS options a lot of Outlook users complaint about connection errors, openssl s_client and Thunderbird works fine. I found some posts about this but none of them had a real solution on this - I meanwhile disabled TLSv1.2 which made the Outlook users happy. I run dovecot 2.2.13, OpenSSL 1.0.1j 15 Oct 2014 ssl_cert = </var/qmail/control/servercert.pem

Hi, currently we deploying Dovecot as imap/pop3 proxy. Every few minutes some panic/assert occurred (we connect roughly 7k - 8k user at one imap proxy with a connection rate of 200/s). We activate core dumps. Concerning the sensitive information in the dump we would prefer to not share the dump (e.g. i found our ssl private key in the dump). Log/Stack trace: Mar 30 15:54:06 imap16 dovecot:

Hi All, Does anyone know how to disable the Director service. In our current running Dovecot 2.2.4, if the director configuration is commented out and Dovecot has no errors nor warnings. But the version 2.2.12 I'm testing with gives out fatal errors. We have dedicated Dovecot Director servers that serve the public frontend and separate dedicated imap/pop3 servers on the backend

Hello, I stumbled across a 5-year-old post on the dovecot list about changing the dovecot hierarchy separator to enable shared mailboxes (http://www.dovecot.org/list/dovecot/2011-January/056201.html <http://www.dovecot.org/list/dovecot/2011-January/056201.html>). At the moment I?m stuck in a pretty similar situation. Migrated from courier to dovecot 2 years ago and preserved the

I have the following two settings in my "10-ssl.conf" file # SSL protocols to use ssl_protocols = !SSLv2 # SSL ciphers to use ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend? Thanks! -- Jerry

Hi, I tried to migrate my dovecot 2.2 to a new server with a other storage configuration and dovecot 2.3. New (and old) Server uses mysql for user information I use the following storage settings mail_home = /storage1/vmail/%{userdb:path} mail_location =

Hey there, i need some help with an administrativ dovecot question. I run a dovecot 2.2.33 ubuntu server with mdbox and "zlib_save = gz zlib_save_level = 6". Now i want to fetch the mailheader from some mails via doveadm fetch -u <user> hdr uid <uid>. The only thing what i receive is some binary stuff. Is there a way, i can tell the dovemadm fetch command, that he

Hi, Have anyone else experienced problems using Dovecot with the mail app in beta releases of iOS/iPadOS 13? TLS is failing for my, it have worked fine for years and I am on the latest Dovecot version now, it works fine with older clients but not with the ones upgraded: Sep 04 19:49:16 imap-login: Debug: SSL: where=0x10, ret=1: before/accept initialization Sep 04 19:49:16 imap-login: Debug: