Re: recommend TLS settings

2017-12-04 Thread Jonathan Sélea
Thanks for very good information and some good criticism! I have taken those into consideration and adjusted it accordingly. Regarding "smtpd_tls_mandatory_ciphers=high", I use port 587 alot. I dont know if that makes any diffrence. Otherwhise, I do agree with you that tools like "hardenize" i

Re: Postfix TLS crash on MacOS 10.13 (High Sierra)

2017-12-04 Thread McKinnon Chris
Hi, Thanks for the guidance Viktor. I wanted to share what worked for me. I was able to get Postfix compiling and working on High Sierra with the following command: make -f Makefile.init makefiles \ CCARGS='-DUSE_SASL_AUTH -DDEF_SERVER_SASL_TYPE=\"dovecot\" -DDEF_COMMAND_DIR=\"/usr/local/sbi

Re: Question regarding smtp_per_record_deadlne parameter

2017-12-04 Thread Wietse Venema
Noel Jones: > On 12/4/2017 3:35 PM, J Doe wrote: > > Hello, > > > > I currently have a server that is configured as a mail forwarding domain > > [1]. Using example.com as an example: > > > > /etc/postfix/main.cf > > virtual_alias_domains = example.com > > virtual_alias_maps

Re: Question regarding smtp_per_record_deadlne parameter

2017-12-04 Thread Noel Jones
On 12/4/2017 3:35 PM, J Doe wrote: > Hello, > > I currently have a server that is configured as a mail forwarding domain [1]. > Using example.com as an example: > > /etc/postfix/main.cf > virtual_alias_domains = example.com > virtual_alias_maps = hash:/etc/postfix/virtual >

Question regarding smtp_per_record_deadlne parameter

2017-12-04 Thread J Doe
Hello, I currently have a server that is configured as a mail forwarding domain [1]. Using example.com as an example: /etc/postfix/main.cf virtual_alias_domains = example.com virtual_alias_maps = hash:/etc/postfix/virtual /etc/postfix/virtual u...@example.com us

Re: recommend TLS settings

2017-12-04 Thread Viktor Dukhovni
> On Dec 4, 2017, at 9:46 AM, Bastian Blank > wrote: > >>> smtpd_tls_mandatory_ciphers=high >> This may be counter-productive. You're forcing peers that >> only do RC4 to send in the clear instead. Probably not a >> win, and with peers that can do HIGH ciphers, you get HIGH >> anyway. On t

Re: recommend TLS settings

2017-12-04 Thread Bastian Blank
On Mon, Dec 04, 2017 at 09:24:48AM -0500, Viktor Dukhovni wrote: > > smtpd_tls_mandatory_ciphers=high > This may be counter-productive. You're forcing peers that > only do RC4 to send in the clear instead. Probably not a > win, and with peers that can do HIGH ciphers, you get HIGH > anyway. On

Re: recommend TLS settings

2017-12-04 Thread Viktor Dukhovni
> On Dec 4, 2017, at 8:22 AM, Jonathan Sélea wrote: > > I recently stumbled upon hardinze too, and came up with this config that > makes the checks "all green". Green per some poorly designed checklist is not necessarily better. > smtpd_tls_protocols = !SSLv2 !SSLv3 > smtpd_tls_mandatory_pro

Re: recommend TLS settings

2017-12-04 Thread Jonathan Sélea
Hi, I recently stumbled upon hardinze too, and came up with this config that makes the checks "all green". smtpd_tls_protocols = !SSLv2 !SSLv3 smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3 smtp_tls_protocols = !SSLv2 !SSLv3 smtp_tls_mandatory_protocols = !SSLv2 !SSLv3 lmtp_tls_protocols = !SSL