Re: TLS: Migrate from *encrypt* to *verify* for specific domain

2018-09-25 Thread Bernhard Schmidt
Am 25.09.18 um 17:34 schrieb Viktor Dukhovni: > > >> On Sep 25, 2018, at 9:29 AM, Paul Menzel wrote: >> >> We want to improve that. Unfortunately, DANE is not an option as the DFN >> does not support that, > > What do you mean by "DFN does not support that"? If by "DFN" you mean > "DFN-Verein"

Semi-OT: gnarwl upstream and forks

2016-07-05 Thread Bernhard Schmidt
Hi, sorry for being sort of off-topic, but I believe this is the best list to ask. We're still using the gnarwl autoresponder on one of our systems and I don't think we'll get rid of it too soon. The original upstream at http://www.onyxbits.de/gnarwl seems to be dead (the latest release

Re: Anonymous TLS connecttion despite DANE/DNSSEC

2014-11-11 Thread Bernhard Schmidt
Hi Viktor, > On Fri, Nov 07, 2014 at 07:48:02PM +0100, Bernhard Schmidt wrote: > >>> DANE does not apply to unsigned domains, even though the MX host >>> might have TLSA RRs. >> >> Ah right, thanks for pointing that out. Should I be concerned that >>

Re: Anonymous TLS connecttion despite DANE/DNSSEC

2014-11-07 Thread Bernhard Schmidt
Hi Viktor, Am 07.11.2014 um 15:39 schrieb Viktor Dukhovni: > On Fri, Nov 07, 2014 at 02:04:27PM +0100, Bernhard Schmidt wrote: > >> However, sometimes mx2.bund.de negotiates an Anonymous TLS connection >> and the mail gets delivered >> >> Nov 7 11:04:39 lxmh

Anonymous TLS connecttion despite DANE/DNSSEC

2014-11-07 Thread Bernhard Schmidt
Hi, we run our outbound mailservers with DANE/DNSSEC enabled for quite some time now. Works great. It looks like one of the two MX for the German government changed implementation yesterday, it now offers TLSv1.2 with ECDHE ciphers and a new certificate. They apparently forgot to update the TLSA

Re: policy daemon failure

2014-06-03 Thread Bernhard Schmidt
Hi Steve, > We use sqlgrey as a policy daemon for greylisting. It runs on both our mail servers with a shared database on one of them. If the database is unavailable for some reason on the main server the backup rejects mail with "451 4.3.5 Server configuration problem" Is it possible to change

Logging syntax errors in SMTP EHLO / Logging the whole session

2013-12-11 Thread Bernhard Schmidt
Hi, long story short, there is a bug in recent Seamonkey builds that emits an empty hostname in EHLO on Windows platforms with IPv6, see https://bugzilla.mozilla.org/show_bug.cgi?id=858540 This is extremely hard to debug when a user complains, because while Postfix rejects it with 501 EHLO 501 S

Re: ipv6 tls smtp connection failing

2013-08-14 Thread Bernhard Schmidt
Hello, I have a small mail server, with ipv6 and i relay the email to my ISP mail server. Their mail server have now ipv6, yet every time my postfix tries to connect to their server it gives timeout: Aug 13 12:51:27 paquete postfix/smtp[25083]: SSL_connect error to smtp.sapo.pt[2001:8a0:2104:ff

Semi-OT: Exchange 2013 SMTP Callout

2013-06-14 Thread Bernhard Schmidt
Hello, this is Semi-OT but since a lot of people run Postfix before Exchange I hope to find some knowledge here. Also heads-up :-) We have a couple of Exchange customers behind our frontend MX servers. We don't turn them up until they have configured their HBT servers to reject unknown recip

Re: check_sasl_access?

2013-01-16 Thread Bernhard Schmidt
Am 16.01.2013 22:39, schrieb Wietse Venema: Bernhard Schmidt: Hello, I did not find it in the manpage, in the odd chance I missed it, is there something like check_sasl_access or check_username_access for smtpd_mumble_restrictions? We just had a compromised account being abused for spamming

check_sasl_access?

2013-01-16 Thread Bernhard Schmidt
Hello, I did not find it in the manpage, in the odd chance I missed it, is there something like check_sasl_access or check_username_access for smtpd_mumble_restrictions? We just had a compromised account being abused for spamming. We had him on the radar before he even got his first mail del

Re: Proper forwarding behaviour

2012-09-24 Thread Bernhard Schmidt
On 23.09.2012 21:51, Ralf Hildebrandt wrote: Hello, >> - try to block as much spam as possible before forwarding (in our case >> that would mean RBL and pre-queue filters, as we are not allowed to drop >> mail we successfully received) > I think you already have some sort of spam filtering in pla

Re: [OT] DNS insights required

2012-09-19 Thread Bernhard Schmidt
On 19.09.2012 11:36, Ralf Hildebrandt wrote: Hi, I'm trying to debug a DNS issue: # host www.pimda.eu www.pimda.eu has address 88.208.252.197 Host www.pimda.eu not found: 3(NXDOMAIN) Host www.pimda.eu not found: 3(NXDOMAIN) Where does the NXDOMAIN come from? # host -t a www.pimda.eu www.pimd

Proper forwarding behaviour

2012-09-18 Thread Bernhard Schmidt
Hi, among our userbase are a couple of thousand people that forward their mail to other domains (mostly freemails). This has the obvious and well-known downside that any spam going to this user looks like it originated in our network, which might lead to some reputation problems. And of course the

Re: Reverse Hostnames with '_msdcs' not valid

2012-08-29 Thread Bernhard Schmidt
Am 29.08.2012 13:34, schrieb Wietse Venema: > Please run the attached programs ON THE AFFTECTED MACHINE. They > show what Postfix gets from your libc routines. > > ./getnameinfo ipaddr > ./getaddrinfo hostname (once for each result from getnameinfo). So it's indeed the system resolver ... see the

Re: Reverse Hostnames with '_msdcs' not valid

2012-08-29 Thread Bernhard Schmidt
Am 29.08.2012 13:20, schrieb Wietse Venema: > Postfix logs a WARNING message if it has a problem with the hostname. > Show that logfile message. I have no warning message about that, that's what is bothering me. Even with the test client in the debug_peer_list and debug_peer_level = 10 the output

Re: Reverse Hostnames with '_msdcs' not valid

2012-08-29 Thread Bernhard Schmidt
Am 29.08.2012 13:05, schrieb Mike: > On 12-08-29 08:01 AM, Bernhard Schmidt wrote: > >> We suspect (and verified with an internal client with custom rDNS) >> that the _msdcs entry is at fault. This hostname does not seem to get >> accepted. As soon as I remove the '_

Reverse Hostnames with '_msdcs' not valid

2012-08-29 Thread Bernhard Schmidt
Hello, we are running Postfix (2.8.4 on SLES10.4 on that particular box, but I also verified with 2.9.1 on Debian Squeeze) with smtpd_client_restrictions = reject_unknown_reverse_client_hostname, reject_unknown_client_hostname, (extensive whitelists of course as well). One sou

Re: TLS SNI support?

2012-05-07 Thread Bernhard Schmidt
Am 07.05.2012 16:17, schrieb Bernhard Schmidt: > It is in use, but not very broadly. I don't have that many users on this > postfix instance, maybe someone with some more traffic can run a statistic. Oops, I have to exclude our monitoring connection, then almost all MUAs send SN

Re: TLS SNI support?

2012-05-07 Thread Bernhard Schmidt
Am 07.05.2012 12:52, schrieb Wietse Venema: > Fiona Hines: >> How do I get TLS SNI support in Postfix?? I can't find any >> documentation on the subject except a few discussions that are >> several years old.? I've got TLS working with one domain but I >> want to expand it to an unknown number of d

Re: TLS certificate validation woes

2011-12-20 Thread Bernhard Schmidt
Am 20.12.2011 14:30, schrieb lst_ho...@kwsoft.de: Hi, Any idea how to allow all certificates issued by specific Sub-CAs, without trusting everyone? >>> >>> As far as i understand you have to list the complete chain but only your >>> sub-CA to get it working. So create a smtpd_tls_CAfile

Re: TLS certificate validation woes

2011-12-20 Thread Bernhard Schmidt
Am 20.12.2011 10:24, schrieb lst_ho...@kwsoft.de: Hello, >> Any idea how to allow all certificates issued by specific Sub-CAs, >> without trusting everyone? > > As far as i understand you have to list the complete chain but only your > sub-CA to get it working. So create a smtpd_tls_CAfile with

TLS certificate validation woes

2011-12-20 Thread Bernhard Schmidt
Hi, I'm having an issue I can't quite understand at the moment. We are part of a larger PKI infrastructure run by the german NREN, which is in the end rooted at the Deutsche Telekom. - Deutsche Telekom Root CA 2 - DFN-Verein PCA Global - G01 - LRZ-CA - G01 <-- this is ours - som

Re: Premature "No Space left on device" on XFS

2011-10-07 Thread Bernhard Schmidt
On 07.10.2011 21:20, Stan Hoeppner wrote: If I may make a purely subjective comment: 2.5m spooled emails on a single host is insane. I'm not arguing that. In the end the system is supposed to cope with 300k mails in 24h, balanced on two servers, which I think can be achieved without a lot o

Re: Premature "No Space left on device" on XFS

2011-10-07 Thread Bernhard Schmidt
Am 07.10.2011 16:01, schrieb lst_ho...@kwsoft.de: >> Someone on the XFS mailinglist believed it could be filesystem >> fragmentation after all. They need an aligned continous 16k block to >> allocate a new inode chunk, otherwise it will fail. I'm going to test >> that later. > > This could be che

Re: Premature "No Space left on device" on XFS

2011-10-07 Thread Bernhard Schmidt
Am 07.10.2011 12:12, schrieb Reindl Harald: > Am 07.10.2011 10:41, schrieb Bernhard Schmidt: >> Basically the only problem with postfix here is that I cannot have >> queue_minfree > 2GB to be on the safe side, so I don't know how to avoid >> this problem > have y

Re: Premature "No Space left on device" on XFS

2011-10-07 Thread Bernhard Schmidt
Hi, > It's not the number of inodes as it is common on ext2/ext3 but the > percentage of space occupied by inodes which is dependant on the inode > size, the number and the size of the volume. Check with xfs_info, on the > filesystems we are using xfs on the percentage is 25% but it may be > diffe

Re: Premature "No Space left on device" on XFS

2011-10-06 Thread Bernhard Schmidt
On 06.10.2011 22:49, lst_ho...@kwsoft.de wrote: Hi, lxmhs45:/var/spool/postfix-bulk/postfix-bulkinhss # touch a touch: cannot touch `a': No space left on device lxmhs45:/var/spool/postfix-bulk/postfix-bulkinhss # df . Filesystem 1K-blocks Used Available Use% Mounted on /dev/sdb 10475520 7471160

Premature "No Space left on device" on XFS

2011-10-06 Thread Bernhard Schmidt
Hey, a small not-quite but a bit postfix related issue. We (or better said: an over-eager third party) have been running some performance tests against our future outbound bulkmail platform (no, not UCE, university stuff), which consists of multiple SLES11.1 VMs with 1GB of RAM and 4 vCPU eac

Mangling the verification database

2011-08-09 Thread Bernhard Schmidt
Hi, we are happily running several postfix installations accepting mails from external sources and distributing them internally. To avoid backscatter all internal destinations we don't have an LDAP connect for are checked using address verification. Until recently we ran version 2.7.1 and di

Re: probleme ipv6

2011-01-20 Thread Bernhard Schmidt
Hi, > my ISP does not support ipv6 > my service for hosting support ipv6 Your system is not reachable from IPv6. fakessh.eu. 38300 IN MX 10 mail.fakessh.eu. mail.fakessh.eu.38303 IN 2001:41d0:2:3dd6:1234:5678:9abc:def0 schleppi% ping6 mail.fakessh

Re: Problem matching IPv6 link-local in cidr-map

2010-11-08 Thread Bernhard Schmidt
On 08.11.2010 21:13, Wietse Venema wrote: Hi Wietse, Nov 8 17:15:46 lxmhs17 postfix/smtpd[15061]: NOQUEUE: reject: RCPT from unknown[fe80::250:56ff:fea9:2c72%vlan6]: 550 5.7.1 Client host rejected: cannot find your reverse hostname, [fe80::250:56ff:fea9:2c72%vlan6]; from=<> to= proto=ESMTP h

Problem matching IPv6 link-local in cidr-map

2010-11-08 Thread Bernhard Schmidt
Hi, postfix 2.7.1 on SLES 10.3 i586 (probably not important, but who knows). We run a production mailserver with reject_unknown_client_hostname enabled (for a few years now). To deal with the unavoidable misconfigurations we have a very large whitelist which was created automatically from yea

Re: IPv6 Reverse DNS

2010-03-21 Thread Bernhard Schmidt
Martin Barry wrote: Hi Martin, > I noted that postfix is writing headers with "unknown" instead of the IPv6 > reverse DNS that I know exists. > > e.g. > > Received: from merboo.mamista.net (unknown [IPv6:2001:470:1f0b:1055::1]) > by tigger.mamista.net (Postfix) with ESMTP id 581F21100B4

Re: Postfix & OpenLDAP

2010-02-02 Thread Bernhard Schmidt
On 02.02.2010 15:29, Victor Duchovni wrote: Hi, And, use "proxy:ldap:${config_directory}/ldap-aliases.cf", LDAP servers typically don't like the connection concurrency that results from each smtpd(8) and cleanup(8) using a separate connection. Don't do this, however, with tables that are used b

Re: Issue with spam being sent by webmail

2009-03-26 Thread Bernhard Schmidt
"Ross Tsolakidis" wrote: Hello Ross, > However, my question (finally) is :) > > Received: from 217.21.80.109 > (SquirrelMail authenticated user > redac...@fearmail.com.au > by webmail.fearmail.com.au with HTTP; > > I have no user called 'redacted' in our email user auth d