Re: detect fake mx, tls security encrypt

2018-12-22 Thread Stefan Bauer
Hi Robert, thanks. already saw that but i dont want to bother remote sites with a 'full verify'. still like the policy server approach. should be no big thing for a coder - familiar with perl. Am Samstag, 22. Dezember 2018 schrieb Robert Schetterer : > Am 22.12.18 um 07:55 schrieb Stefan Bauer: >

Re: detect fake mx, tls security encrypt

2018-12-22 Thread Robert Schetterer
Am 22.12.18 um 07:55 schrieb Stefan Bauer: nights later, a better approach seems to have a policy service that does the tls pre-checking. long time ago i wrote this https://blog.sys4.de/recipient-verification-tls-mandatory-modus-en.html perhaps it helps Something like this already around?

Re: detect fake mx, tls security encrypt

2018-12-21 Thread Stefan Bauer
nights later, a better approach seems to have a policy service that does the tls pre-checking. Something like this already around? ( i'm no coder but want to sponsor that if someone can do it) pm please Am Donnerstag, 20. Dezember 2018 schrieb Viktor Dukhovni < postfix-us...@dukhovni.org>: >> On

Re: detect fake mx, tls security encrypt

2018-12-20 Thread Stefan Bauer
thats a nice approach! thank you. will test. Am Donnerstag, 20. Dezember 2018 schrieb Viktor Dukhovni < postfix-us...@dukhovni.org>: >> On Dec 20, 2018, at 1:25 PM, Stefan Bauer wrote: >> >> I'm aware of such exceptions but I don't like to set them. Our policy is safe or not at all via mail. > >

Re: detect fake mx, tls security encrypt

2018-12-20 Thread Viktor Dukhovni
> On Dec 20, 2018, at 1:25 PM, Stefan Bauer wrote: > > I'm aware of such exceptions but I don't like to set them. Our policy is > safe or not at all via mail. That policy has a cost. You don't like the cost, but there it is... > I would like to have a setting like do not try next mx, > if fi

Re: detect fake mx, tls security encrypt

2018-12-20 Thread Stefan Bauer
I'm aware of this exeptions but i dont like to set them. our policy is safe or not at all via mail. i would like to have a setting like do not try next mx, if first mx lacks tls support. it assumes that if tls is not avail on primary it will for sure also not be avail on second and third. Am Donn

Re: detect fake mx, tls security encrypt

2018-12-20 Thread Viktor Dukhovni
> On Dec 20, 2018, at 12:42 PM, Stefan Bauer wrote: > > I use smtp_tls_security_level = encrypt The cost of that choice is that you must also have: main.cf: indexed = ${default_database_type}:${config_directory}/ smtp_tls_policy_maps = ${indexed}tls-policy and be prepared to watch yo

Re: detect fake mx, tls security encrypt

2018-12-20 Thread Noel Jones
On 12/20/2018 11:42 AM, Stefan Bauer wrote: > Hi, > > i use smtp_tls_security_level = encrypt - if remote site have mx like > > mx 10 mail1 without tls > mx 100 mail2 fake-mx with no open port > > postfix detects lack of tls on mx10goes to mx100 and waits > maximal_queue_lifetime. > > i don't l