Re: Outbound TLS Certificate Verification

2017-06-16 Thread Wietse Venema
Osama Al-Hassani: > > Which Postfix SMTP client implementation matches server certificates > > against server IP addresses? > > We are using 3.2.0 vanilla. > > To clarify, this is when using the "match" attribute with "verify" security > level. I could rephrase the question as to why anything

RE: Outbound TLS Certificate Verification

2017-06-16 Thread Osama Al-Hassani
DNS names are ignored in the SANs field? Thanks, Osama -Original Message- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema Sent: 15 June 2017 21:47 To: Postfix users Subject: Re: Outbound TLS Certificate Verification Os

Re: Outbound TLS Certificate Verification

2017-06-15 Thread Wietse Venema
; Osama > > -Original Message- > From: owner-postfix-us...@postfix.org > [mailto:owner-postfix-us...@postfix.org] On Behalf Of Viktor Dukhovni > Sent: 15 June 2017 01:33 > To: postfix-users@postfix.org > Subject: Re: Outbound TLS Certificate Verification > > On W

RE: Outbound TLS Certificate Verification

2017-06-15 Thread Osama Al-Hassani
...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Viktor Dukhovni Sent: 15 June 2017 01:33 To: postfix-users@postfix.org Subject: Re: Outbound TLS Certificate Verification On Wed, Jun 14, 2017 at 09:12:20PM +, Osama Al-Hassani wrote: > When verifying server certificates on outbo

Re: Outbound TLS Certificate Verification

2017-06-14 Thread Viktor Dukhovni
On Wed, Jun 14, 2017 at 09:12:20PM +, Osama Al-Hassani wrote: > When verifying server certificates on outbound connections, it seems we > are unable verify the IP addresses part of the SANs field. We are able to > verify IPs in CNs. Email is sent to addresses of the form , where the "domain-p

Outbound TLS Certificate Verification

2017-06-14 Thread Osama Al-Hassani
Hi all, When verifying server certificates on outbound connections, it seems we are unable verify the IP addresses part of the SANs field. We are able to verify IPs in CNs. What is the reasoning behind this behaviour? Thank you, Osama Osama Al-Hassani Software Engineer [Telephone] +44 118